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Miller C, Al-Jabri A, O'Murchada L, Mustafa M, Cooke J, Phelan N, Healy ML. Use of a dosimetry-based RAI protocol for treatment of benign hyperthyroidism optimises response while minimising exposure to ionising radiation. Clin Endocrinol (Oxf) 2024; 100:585-592. [PMID: 38567706 DOI: 10.1111/cen.15054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 02/29/2024] [Accepted: 03/22/2024] [Indexed: 05/08/2024]
Abstract
BACKGROUND The optimal treatment strategy for radioiodine (RAI) treatment protocols for benign hyperthyroidism remains elusive. Although individualised activities are recommended in European Law, many centres continue to provide fixed activities. Our institution implemented a dosimetry protocol in 2016 following years of fixed dosing which facilitates the calculation of individualised activities based on thyroid volume and radioiodine uptake. METHODS This was a retrospective study comparing success rates using a dosimetry protocol targeting an absorbed dose of 150 Gy for Graves' disease (GD) and 125 Gy for Toxic Multinodular Goiter (TMNG) with fixed dosing (200MBq for GD and 400MBq for TMNG) among 204 patients with hyperthyroidism. Success was defined as a non-hyperthyroid state at 1 year for both disease states. Results were analysed for disease specific or patient specific modulators of response. RESULTS This study included 204 patients; 74% (n = 151) received fixed activities and 26% (n = 53) of activities administered were calculated using dosimetry. A dosimetry-based protocol was successful in 80.5% of patients with GD and 100% of patients with TMNG. Differences in success rates and median activity administered between the fixed (204Mbq) and dosimetry (246MBq) cohort were not statistically significant (p = .64) however 44% of patients with GD and 70% of patients with TMNG received lower activities following treatment with dosimetry as opposed to fixed activities. Use of dosimetry resulted in successful treatment and reduced RAI exposure for 36% of patients with GD, 70% of patients with TMNG, and 44% of patients overall. CONCLUSION This retrospective clinical study demonstrated that treatment with a dosimetry-based protocol for TMNG and GD achieved comparable success rates to fixed protocols while reducing RAI exposure for over a third of patients with GD and most patients with TMNG. This study also highlighted that RAI can successfully treat hyperthyroidism for some patients with activities lower than commonplace in clinical practise. No patient or disease specific modulators of treatment response were established in this study; however, the data supports a future prospective trial which further scrutinises the individual patient factors governing treatment response to RAI.
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Affiliation(s)
- Clare Miller
- Department of Endocrinology, St James's Hospital, Dublin, Ireland
| | - Amna Al-Jabri
- Department of Radiology and Molecular Imaging, Sultan Qaboos University, Seeb, Oman
- Department of Nuclear Medicine, St James's Hospital, Dublin, Ireland
| | - Liam O'Murchada
- Department of Endocrinology, St James's Hospital, Dublin, Ireland
| | - Mohamad Mustafa
- Department of Endocrinology, St James's Hospital, Dublin, Ireland
| | - Jennie Cooke
- Department of Nuclear Medicine, St James's Hospital, Dublin, Ireland
| | - Niamh Phelan
- Department of Endocrinology, St James's Hospital, Dublin, Ireland
- Clinical Medicine, School of Medicine, Trinity College, Dublin, Ireland
| | - Marie-Louise Healy
- Department of Endocrinology, St James's Hospital, Dublin, Ireland
- Clinical Medicine, School of Medicine, Trinity College, Dublin, Ireland
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Khreish F, Schaefer-Schuler A, Roth L, Burgard C, Rosar F, Ezziddin S. Concomitant lithium increases radioiodine uptake and absorbed doses per administered activity in graves' disease: comparison of conventional versus lithium-augmented radioiodine therapy. Front Med (Lausanne) 2024; 11:1382024. [PMID: 38646563 PMCID: PMC11026544 DOI: 10.3389/fmed.2024.1382024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Accepted: 03/21/2024] [Indexed: 04/23/2024] Open
Abstract
BackgroundLithium inhibits iodine and thyroid hormone release from thyroid cells, possibly increasing radioiodine retention and anti-hyperthyroid efficacy when given adjunctively to radioiodine therapy (RAI) of Graves’ disease (GD). However, the literature contains limited dosimetric data regarding the influence of concomitant lithium in this setting.MethodsWe retrospectively compared dosimetric variables in patients undergoing RAI with/without adjunctive lithium (n = 52 each). We assessed two low-dose, short-duration oral lithium carbonate regimens, 450 mg/d (n = 22) or 900 mg/d (n = 30), for a mean of 4.7 ± 1.4 d starting upon RAI administration. Patients underwent diagnostic testing to measure thyroidal radioiodine uptake (RAIU) 24 h ± 2 h after ingesting up to 5 MBq radioiodine, receiving individualized RAI activities 24 h later. Using ≥3 RAIU daily measurements starting 24 h post-RAI, researchers were able to determine the effective radioiodine half-life and absorbed dose to the thyroid; we also calculated the absorbed dose per administered activity concentration within that organ. Rates of GD cure, defined as reaching euthyroidism or hypothyroidism post-RAI, were evaluated in patients with ~6 months or longer post-RAI follow-up.ResultsThe lithium dosage subgroups had similar dosimetric values and thus are considered together. Lithium patients and controls had similar average “diagnostic” RAIU (51.1% ± 15.7% vs. 50.6% ± 13.8%, p = 0.820), but the former had significantly higher RAIU post-RAI (56.3% ± 13.5% vs. 49.1% ± 13.5%, p = 0.002), reflecting significantly greater change in the former (+16.2% ± 30.4% vs. -1.8% ± 16.1%, p = 0.001). Radioiodine effective half-life was non-significantly longer in lithium patients (5.43 ± 1.50 d vs. 5.08 ± 1.16 d, p = 0.192). The mean RAI administered activity was 27% less in lithium patients (677 ± 294 MBq vs. 930 ± 433 MBq, p = 0.001), but GD cure rates were similar (83% [39/47] vs. 82% [33/40], p = 0.954), possibly due to the significantly higher thyroid dose in the lithium patients, especially in thyroid gland with a volume ≤ 20 mL (1.04 ± 0.44 Gy/MBq vs. 0.76 ± 0.30 Gy/MBq, p = 0.020). Day 3 serum lithium concentrations were low (450 mg/d: 0.26 ± 0.12 mmol/L, 900 mg/d: 0.50 ± 0.18 mmol/L); no lithium toxicity was noted.ConclusionLithium augmentation may increase the RAIU and thyroid absorbed dose, permitting potentially decreased RAI activities without sacrificing efficacy. Our observations should be confirmed in a prospective, randomized trial.
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Affiliation(s)
- Fadi Khreish
- Department of Nuclear Medicine, Saarland University Hospital, Homburg, Germany
- Department of Nuclear Medicine, Campus-Fulda, University of Marburg, Fulda, Germany
| | | | - Leonie Roth
- Department of Nuclear Medicine, Saarland University Hospital, Homburg, Germany
| | - Caroline Burgard
- Department of Nuclear Medicine, Saarland University Hospital, Homburg, Germany
| | - Florian Rosar
- Department of Nuclear Medicine, Saarland University Hospital, Homburg, Germany
| | - Samer Ezziddin
- Department of Nuclear Medicine, Saarland University Hospital, Homburg, Germany
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Song Q, Fang Z, Wang S, Liu Z, Xiao W, Zong H, Xie Y. Correlation Between TRAb and Early Onset Hypothyroidism After 131I Treatment for Graves' Disease. Horm Metab Res 2024. [PMID: 38574667 DOI: 10.1055/a-2272-5165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
The aim of the study was to explore the clinical features related to early hypothyroidism and the relationship between the changes of thyrotropin receptor antibodies (TRAb) and early hypothyroidism in the course of 131I treatment for Graves' disease. This study was a retrospective observation, including 226 patients who received the first 131I treatment. The general information and laboratory tests were collected before and after 131I treatment, and the laboratory data affecting the difference in disease outcome were analyzed. According to the changes of antibodies in the third month, whether the changes of antibodies were involved in the occurrence of early-onset hypothyroidism was analyzed. Early onset hypothyroidism occurred in 165 of 226 patients, and the results showed that the incidence of early hypothyroidism was higher in patients with low baseline TRAb level (p=0.03) and increased TRAb after treatment (p=0.007). Both baseline TRAb levels (p<0.001) and the 24-hour iodine uptake rate (p=0.004) are significant factors influencing the changes in TRAb. The likelihood of a rise in TRAb was higher when the baseline TRAb was less than 18.55 U/l and the 24-hour iodine uptake level exceeded 63.61%. Low baseline and elevated post-treatment levels of TRAb were significantly associated with early-onset hypothyroidism after 131I treatment. Monitoring this index during RAI treatment is helpful in identifying early-onset hypothyroidism and mastering the clinical outcome and prognosis of Graves' disease.
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Affiliation(s)
- Qi Song
- Endocrine Department, Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Zhouyu Fang
- Endocrine Department, Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Shurong Wang
- Endocrine Department, Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Zhihua Liu
- Endocrine Department, Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Wenjin Xiao
- Endocrine Department, Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Haijun Zong
- Endocrine Department, Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Ying Xie
- Endocrine Department, Second Affiliated Hospital of Soochow University, Suzhou, China
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Koç I, Bahçecioğlu AB, Avcı Merdin F, Araz M, Erdoğan MF. Long-term effects of radioiodine treatment on thyroid functions and ultrasonographic features in patients with toxic adenoma and toxic multinodular goitre. Ann Nucl Med 2023; 37:371-379. [PMID: 37010726 DOI: 10.1007/s12149-023-01834-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 03/13/2023] [Indexed: 04/04/2023]
Abstract
OBJECTIVE This study aimed to investigate the long-term effect of radioiodine (RAI) treatment on thyroid functions and ultrasonographic changes in the thyroid gland and toxic nodules. METHODS Thyroid function tests and ultrasonography reports of patients diagnosed with toxic adenoma (TA) or toxic multinodular goitre (TMNG) between 2000 and 2021 were retrospectively analysed. RESULTS We included 100 patients whom thyroid function and ultrasonography results were obtained from our outpatient clinic before and at least 36 months post-RAI. At the end of the follow-up period, the mean thyroid volume reduction in patients with TA and TMNG was 56.6% ± 3.1% and 51.1% ± 6.7%, respectively; the mean volume decrease of all toxic nodules was 80.5% ± 1.9%. The volume of the thyroid and toxic nodules was significantly reduced up to 12 years (p < 0.01). Between 3 and 10 years after RAI therapy, the annual incidence of hypothyroidism was 2.0% and 1.5% in the TA and TMNG groups, respectively. Toxic nodules were more frequently solid and hypoechoic in post-RAI ultrasounds (p < 0.01). CONCLUSIONS The volume of thyroid gland and toxic nodules continuously decreases, as the risk of hypothyroidism increases up to 10 years after RAI treatment. After RAI treatment, patients should be followed up to check their thyroid functions. In post-RAI examinations, toxic nodules may show ultrasonographic features suspicious for malignancy. History taking should include previous RAI therapies and old scintigraphy scans should be evaluated to avoid unnecessary procedures and non-diagnostic biopsy results.
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Affiliation(s)
- Ilgın Koç
- Department of Internal Medicine, Ankara University, School of Medicine, Ankara, Turkey
| | - Adile Begüm Bahçecioğlu
- Department of Endocrinology and Metabolism, Gulhane Education and Research Hospital, Ankara University, School of Medicine, İbni-Sina Hospital, Altındağ, 06100, Ankara, Turkey.
| | - Fatma Avcı Merdin
- Department of Endocrinology and Metabolism, Gulhane Education and Research Hospital, Ankara University, School of Medicine, İbni-Sina Hospital, Altındağ, 06100, Ankara, Turkey
| | - Mine Araz
- Department of Nuclear Medicine, Ankara University, School of Medicine, Ankara, Turkey
| | - Murat Faik Erdoğan
- Department of Endocrinology and Metabolism, Gulhane Education and Research Hospital, Ankara University, School of Medicine, İbni-Sina Hospital, Altındağ, 06100, Ankara, Turkey
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Duan L, Zhang HY, Lv M, Zhang H, Chen Y, Wang T, Li Y, Wu Y, Li J, Li K. Machine learning identifies baseline clinical features that predict early hypothyroidism in patients with Graves' disease after radioiodine therapy. Endocr Connect 2022; 11:e220119. [PMID: 35521803 PMCID: PMC9175589 DOI: 10.1530/ec-22-0119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 04/22/2022] [Indexed: 11/08/2022]
Abstract
Background and objective Radioiodine therapy (RAI) is one of the most common treatment solutions for Graves' disease (GD). However, many patients will develop hypothyroidism as early as 6 months after RAI. This study aimed to implement machine learning (ML) algorithms for the early prediction of post-RAI hypothyroidism. Methods Four hundred and seventy-one GD patients who underwent RAI between January 2016 and June 2019 were retrospectively recruited and randomly split into the training set (310 patients) and the validation set (161 patients). These patients were followed for 6 months after RAI. A set of 138 clinical and lab test features from the electronic medical record (EMR) were extracted, and multiple ML algorithms were conducted to identify the features associated with the occurrence of hypothyroidism 6 months after RAI. Results An integrated multivariate model containing patients' age, thyroid mass, 24-h radioactive iodine uptake, serum concentrations of aspartate aminotransferase, thyrotropin-receptor antibodies, thyroid microsomal antibodies, and blood neutrophil count demonstrated an area under the receiver operating curve (AUROC) of 0.72 (95% CI: 0.61-0.85), an F1 score of 0.74, and an MCC score of 0.63 in the training set. The model also performed well in the validation set with an AUROC of 0.74 (95% CI: 0.65-0.83), an F1 score of 0.74, and a MCC of 0.63. A user-friendly nomogram was then established to facilitate the clinical utility. Conclusion The developed multivariate model based on EMR data could be a valuable tool for predicting post-RAI hypothyroidism, allowing them to be treated differently before the therapy. Further study is needed to validate the developed prognostic model at independent sites.
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Affiliation(s)
- Lian Duan
- Department of Nuclear Medicine, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi, China
| | - Han-Yu Zhang
- Changzhi Medical College, Changzhi, Shanxi, China
| | - Min Lv
- Department of Nuclear Medicine, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi, China
| | - Han Zhang
- Changzhi Medical College, Changzhi, Shanxi, China
| | - Yao Chen
- Changzhi Medical College, Changzhi, Shanxi, China
| | - Ting Wang
- Department of Nuclear Medicine, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi, China
| | - Yan Li
- Department of Nuclear Medicine, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi, China
| | - Yan Wu
- Department of Clinical Laboratory, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong, China
| | - Junfeng Li
- Department of Radiology, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi, China
| | - Kefeng Li
- School of Medicine, University of California, San Diego, California, USA
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Alvi AM, Azmat U, Shafiq W, Ali Rasheed AH, Siddiqi AI, Khan S, Ashfaq S, Irfan H, Bashir H, Abu Bakar M, Asghar K. Efficacy of Radioiodine Therapy in Patients With Primary Hyperthyroidism: An Institutional Review From Pakistan. Cureus 2022; 14:e24992. [PMID: 35719786 PMCID: PMC9191269 DOI: 10.7759/cureus.24992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/14/2022] [Indexed: 11/05/2022] Open
Abstract
Background Radioactive iodine (RAI) is the treatment of choice for most patients with primary hyperthyroidism. The most common etiologies of hyperthyroidism are Graves' disease (GD), toxic adenoma (TA), and toxic multinodular goiter (TMNG). A single dose of RAI is usually sufficient to cure hyperthyroidism. The aim of this study was to assess the effectiveness of RAI therapy for patients diagnosed with primary hyperthyroidism. Methods and materials Patients diagnosed with hyperthyroidism who received RAI therapy between 2008 and 2018 were included in the study. The data was acquired from the hospital's electronic medical record system. Following the RAI treatment, a cure was defined as the development of euthyroidism or hypothyroidism after a single fixed-dose without antithyroid medication within one year of RAI therapy. In addition, a simple logistics regression model was used to identify the prognostic factors that may lead to better outcomes. Results A total of 112 patients diagnosed with hyperthyroidism with a mean age of 47 ± 14 were included in this study. The majority of the patients were female, 79 (70.5%). Within one year of RAI therapy, 84 (75%) patients achieved a cure that is either hypothyroid or euthyroid status. RAI dose was higher in responsive patients (18.50 ± 4.10 millicurie [mCi] versus 16.50 ± 4.10 mCi) than in non-responsive patients. The mean RAI doses were 16.05 ± 2.99 mCi in GD, 19.81 ± 4.40 mCi in TMNG, and 20.50 ± 3.30 mCi in TA, with a statistically significant p-value of 0.001. In the univariable logistic regression model, RAI dose was a significant prognostic factor of the responsive group (OR: 1.15, CI [1.01-1.31], p-value 0.03). Conclusion Our data presented that RAI therapy is effective for primary hyperthyroidism. We achieved remission with a single fixed-dose in the majority of patients. Most of our patients were cured within three months of RAI therapy. In addition, the RAI dose was higher in the responsive group as compared to the non-responsive group.
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Ota Y, Avram AM. Nuclear medicine therapy of Plummer adenoma. Nucl Med Mol Imaging 2022. [DOI: 10.1016/b978-0-12-822960-6.00176-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Taprogge J, Gape PM, Carnegie-Peake L, Murray I, Gear JI, Leek F, Hyer SL, Flux GD. A Systematic Review and Meta-Analysis of the Relationship Between the Radiation Absorbed Dose to the Thyroid and Response in Patients Treated with Radioiodine for Graves' Disease. Thyroid 2021; 31:1829-1838. [PMID: 34598656 PMCID: PMC8721505 DOI: 10.1089/thy.2021.0302] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Background: Patients with Graves' disease are commonly treated with radioiodine. There remains controversy over whether the aim of treatment should be to achieve euthyroidism or hypothyroidism, and whether treatments should be administered with standard levels of radioactivity or personalized according to the radiation absorbed doses delivered to the thyroid. The aim of this review was to investigate whether a relationship exists between radiation absorbed dose and treatment outcome. Methods: A systematic review and meta-analysis of all reports published before February 13, 2020, were performed using PubMed, Web of Science, OVID MEDLINE, and Embase. Proportion of patients achieving nonhyperthyroid status was the primary outcome. Secondary outcomes were proportion of patients who were specifically euthyroid or hypothyroid. A random-effects meta-analysis of proportions was performed for primary and secondary outcomes, and the impact of the radiation absorbed dose on treatment outcome was assessed through meta-regression. The study is registered with PROSPERO (CRD42020175010). Results: A total of 1122 studies were identified of which 15, comprising 2303 Graves' disease patients, were eligible for the meta-analysis. A strong association was found between radiation absorbed dose and nonhyperthyroid and hypothyroid outcomes (odds ratio [OR] = 1.11 [95% confidence interval {CI} 1.08-1.14] and OR = 1.09 [CI 1.06-1.12] per 10 Gy increase). Higher rates of euthyroid outcome were found for radiation absorbed doses within the range 120-180 Gy when compared with outside this range (n = 1172, OR = 2.50 [CI 1.17-5.35], p = 0.018). A maximum euthyroid response of 38% was identified at a radiation absorbed dose of 128 Gy. Conclusions: The presented radiation absorbed dose-response relationships can facilitate personalized treatment planning for radioiodine treatment of patients with Graves' disease. Further studies are required to determine how patient-specific covariates can inform personalized treatments.
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Affiliation(s)
- Jan Taprogge
- Joint Department of Physics, Royal Marsden NHSFT, Sutton, United Kingdom
- The Institute of Cancer Research, London, United Kingdom
- Address correspondence to: Jan Taprogge, PhD, Joint Department of Physics, Royal Marsden NHSFT, Downs Road, Sutton SM2 5PT, United Kingdom
| | - Paul M.D. Gape
- Joint Department of Physics, Royal Marsden NHSFT, Sutton, United Kingdom
- The Institute of Cancer Research, London, United Kingdom
| | - Lily Carnegie-Peake
- Joint Department of Physics, Royal Marsden NHSFT, Sutton, United Kingdom
- The Institute of Cancer Research, London, United Kingdom
| | - Iain Murray
- Joint Department of Physics, Royal Marsden NHSFT, Sutton, United Kingdom
- The Institute of Cancer Research, London, United Kingdom
| | - Jonathan I. Gear
- Joint Department of Physics, Royal Marsden NHSFT, Sutton, United Kingdom
- The Institute of Cancer Research, London, United Kingdom
| | - Francesca Leek
- Joint Department of Physics, Royal Marsden NHSFT, Sutton, United Kingdom
- The Institute of Cancer Research, London, United Kingdom
| | - Steve L. Hyer
- Department of Endocrinology, Epsom and St Helier University Hospitals NHS Trust, Carshalton, Surrey, United Kingdom
| | - Glenn D. Flux
- Joint Department of Physics, Royal Marsden NHSFT, Sutton, United Kingdom
- The Institute of Cancer Research, London, United Kingdom
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Peterson ME, Rishniw M. Predicting outcomes in hyperthyroid cats treated with radioiodine. J Vet Intern Med 2021; 36:49-58. [PMID: 34817910 PMCID: PMC8783366 DOI: 10.1111/jvim.16319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 11/05/2021] [Accepted: 11/15/2021] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND Radioiodine (131 I) is the treatment of choice for cats with hyperthyroidism. After 131 I, however, euthyroidism is not always achieved, with 5% to 10% of cats remaining persistently hyperthyroid and 20% to 50% developing iatrogenic hypothyroidism. OBJECTIVES To identify pretreatment factors that may help predict persistent hyperthyroidism and iatrogenic hypothyroidism after treatment of cats using a novel 131 I dosing algorithm. ANIMALS One thousand and four hundred hyperthyroid cats treated with 131 I. METHODS Prospective, before-and-after study. Pretreatment predictors (clinical, laboratory, scintigraphic, 131 I dose, 131 I uptake measurements) of treatment failure or iatrogenic hypothyroidism were identified by multivariable logistic regression analysis. RESULTS Cats that developed iatrogenic hypothyroidism were more likely to be older (odds ratio [OR] = 1.10; 95% confidence interval [CI], 1.04-1.17; P = .001), female (OR = 2.04; 95% CI, 1.54-2.70; P < .001), have detectable serum thyroid-stimulating hormone (TSH) concentrations (OR = 4.19; 95% CI, 2.0-8.81; P < .001), have bilateral thyroid nodules (OR = 1.57; 95% CI, 1.19-2.08; P < .001), have homogeneous, bilateral distribution of 99m Tc-pertechnetate uptake (OR = 2.93; 95% CI, 2.05-4.19; P < .001), have milder severity score (OR = 0.62; 95% CI, 0.49-0.79; P < .001), and have higher 131 I uptake (OR = 2.40; 95% CI, 1.75-3.28; P < .001). In contrast, cats remaining persistently hyperthyroid were more likely to be younger (OR = 0.81; 95% CI, 0.72-0.92; P < .001), have higher severity score (OR = 1.87; 95% CI, 1.51-2.31; P < .001), and have lower 131 I uptake (OR = 3.50; 95% CI, 1.8-6.80; P < .001). CONCLUSIONS AND CLINICAL IMPORTANCE Age, sex, serum TSH concentration, bilateral and homogeneous 99m Tc-pertechnetate uptake on scintigraphy, severity score, and percent 131 I uptake are all factors that might help predict outcome of 131 I treatment in hyperthyroid cats. Cats with persistent hyperthyroidism had many predictive factors that directly contrasted those of cats that developed 131 I-induced hypothyroidism.
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Affiliation(s)
- Mark E Peterson
- Animal Endocrine Clinic, New York, New York, USA.,College of Veterinary Medicine, Cornell University, Ithaca, New York, USA
| | - Mark Rishniw
- College of Veterinary Medicine, Cornell University, Ithaca, New York, USA.,Veterinary Information Network, Davis, California, USA
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Leitha T, Schartel M, Hurtl I, Bednar R, König F, Mayrhofer K, Pietschmann F. Dosimetry-guided radioiodine therapy of hyperthyroidism: long-term experience and implications for guidelines. Nucl Med Commun 2021; 42:150-159. [PMID: 33165252 DOI: 10.1097/mnm.0000000000001315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Long-term follow-up after radioactive iodine therapy (RIT) for Graves' disease and toxic thyroid autonomy is incompletely addressed by current guidelines. We retrospectively analyzed the clinical course of 1233 out of 1728 consecutive Graves' disease (n = 536) and thyroid autonomy (n = 1192) patients after dosimetry-guided RIT to optimize follow-up. METHODS Patients were referred between 1990 and 2018; follow-up was monitored according to available electronic registers with medical reports, including autopsies from 9 hospitals and 10 residential care homes. RESULTS In total, 495/1728 cases were censored because of incomplete 6-month follow-up data. The conversion rates to hypothyroidism in Graves' disease and different forms of thyroid autonomy can be deconvoluted into two follow-up periods: first year after RIT and afterward. The conversion rate in Graves' disease was significantly higher than that in all thyroid autonomy subgroups during the first year but almost identical afterwards. Thyroxine substitution started between 10 and 7900 days after RIT at thyroid stimulating hormone between 0.11 and 177 µU/ml. CONCLUSIONS We advise earlier (2-3 weeks) first follow-up checks after RIT in all Graves' disease patients and thyroid autonomy under antithyroid drugs (ATD) and re-checks every 2-4 weeks until conversion to hypothyroidism during the first year. The first check in thyroid autonomy without ATD should be after 3-4 weeks with re-checks every 4-6 weeks. After 1 year, both groups can be re-checked every 4-6 months over the next 5 years. The success rate of RIT in thyroid autonomyincreases with age but the history of RIT is rapidly lost during follow-up.
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Affiliation(s)
- Thomas Leitha
- Department of Nuclear Medicine, Danube Hospital, Vienna, Austria
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Stachura A, Gryn T, Kałuża B, Budlewski T, Franek E. Predictors of euthyreosis in hyperthyroid patients treated with radioiodine 131I -: a retrospective study. BMC Endocr Disord 2020; 20:77. [PMID: 32487052 PMCID: PMC7268615 DOI: 10.1186/s12902-020-00551-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 05/10/2020] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND Radioiodine (RAI) treatment for hyperthyroidism is a very common modality, chosen by physicians worldwide. The outcome of the therapy, however, is not always predictable. While rendering a patient hypo- or euthyroid is meant as a therapeutic success, the latter does not require lifelong hormonal supplementation. The aim of our study is to determine predictors of euthyreosis in patients who underwent RAI treatment. METHODS Medical records of 144 patients who had undergone RAI therapy were examined. Laboratory and clinical data were analyzed statistically. Ultrasonography findings, such as thyroid volume, nodules' size and characteristics had been collected at the beginning of treatment and 6 months after the administration of radioiodine 131I-. Moreover, scintigraphy results were taken into account. Multivariate logistic regression analysis model has been used to find predictors of euthyroidism after 12 months of follow-up. The predictors of normal thyroid function have also been analyzed separately for patients with GD (Graves' disease) and TMNG (toxic multinodular goiter). RESULTS The analysis showed that age (OR 1,06; 95%CI 1.025-1.096, p = 0,001), thyroid gland volume (OR 1,04; 95%CI 1,02-1,06; p < 0.001) and iodine uptake level (OR 0,952; 95%CI 0,91-0,98; p = 0,004) were significant factors of achieving normal thyroid function after RAI therapy. According to multivariate logistic regression analysis, in GD patients only age has been shown to be a significant factor (OR 1,06; 95%CI 1,001-1,13; p = 0.047), while in TMNG patients' age (OR 1,04; 95%CI 1-1,09; p = 0.048), thyroid gland volume (OR 1.038; 95%CI 1.009-1.068; p = 0.009) and iodine uptake level (OR 0.95; 95%CI 0.9-0.99; p = 0.02) all have been proven to be significant predictors of achieving euthyroidism. CONCLUSIONS The more advanced age, larger volume of thyroid gland and lower iodine uptake level are predictors of euthyreosis after RAI treatment.
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Affiliation(s)
- Albert Stachura
- Department of Internal Medicine, Endocrinology and Diabetology, Central Clinical Hospital of the Ministry of the Interior, Wołoska 137, 02-507, Warsaw, Poland
| | - Tomasz Gryn
- Department of Internal Medicine, Endocrinology and Diabetology, Central Clinical Hospital of the Ministry of the Interior, Wołoska 137, 02-507, Warsaw, Poland
| | - Bernadetta Kałuża
- Department of Internal Medicine, Endocrinology and Diabetology, Central Clinical Hospital of the Ministry of the Interior, Wołoska 137, 02-507, Warsaw, Poland.
| | - Tadeusz Budlewski
- Nuclear Medicine Department, Central Clinical Hospital of the Ministry of the Interior, Warsaw, Poland
| | - Edward Franek
- Department of Internal Medicine, Endocrinology and Diabetology, Central Clinical Hospital of the Ministry of the Interior, Wołoska 137, 02-507, Warsaw, Poland
- Department of Human Epigenetics, Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland
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Hu RT, Liu DS, Li B. Predictive factors for early hypothyroidism following the radioactive iodine therapy in Graves' disease patients. BMC Endocr Disord 2020; 20:76. [PMID: 32471411 PMCID: PMC7260835 DOI: 10.1186/s12902-020-00557-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 05/21/2020] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Radioactive iodine (RAI) therapy is an important treatment option for Graves' disease (GD), the main side effect of RAI treatment is hypothyroidism, and the factors resulting in hypothyroidism are still controversial. The purpose of this retrospective study was to clarify the possible risk factors of early hypothyroidism after RAI therapy in Graves' disease. METHODS We reviewed 312 GD patients treated with RAI between January 2017 to December 2018, collected the potential risk factors, and analyzed the relationship between these variables and early hypothyroidism. RESULTS After 6 months' follow-up, 218 (69.87%) patients were evaluated as early hypothyroid. Male gender, shorter duration of disease, smaller thyroid weight, lower 2-h radioactive iodine uptake (RAIU), 6-h RAIU, 24-h RAIU and 6/24-h uptake ratio, lower administered dosages were significantly associated with early hypothyroidism. Logistics regression analysis showed that male gender, smaller thyroid weight and lower 6-h RAIU were associated with early hypothyroidism. Multi-factors combined ROC curve analysis suggested that the predictive power of male gender, smaller thyroid weight and lower 6-h RAIU for early hypothyroidism was 0.711. CONCLUSIONS Our results show that RAI is an effective therapy for GD and most of the cured patients became to hypothyroid within 6 months. Male gender, smaller thyroid weight and lower 6-h RAIU are the main risk factors for early hypothyroidism.
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Affiliation(s)
- Rui-Ting Hu
- Department of Traditional Chinese Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
- Department of Endocrinology, Hospital of Traditional Chinese Medicine of Linyi City, Linyi, 276002, Shandong, China
| | - De-Shan Liu
- Department of Traditional Chinese Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Bin Li
- Department of Nuclear Medicine, Linyi People's Hospital, Cheeloo College of Medicine, Shandong University, Linyi, 276000, Shandong, China.
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Yang YT, Chen JF, Tung SC, Kuo MC, Weng SW, Chou CK, Shen FC, Chang CM, Tsai CJ, Taso CF, Wang PW. Long-term outcome and prognostic factors of single-dose Radioiodine Therapy in patients with Graves' disease. J Formos Med Assoc 2020; 119:925-932. [PMID: 32057544 DOI: 10.1016/j.jfma.2020.01.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 11/21/2019] [Accepted: 01/21/2020] [Indexed: 06/10/2023] Open
Abstract
BACKGROUND/PURPOSE Few studies exist investigating the effectiveness of radioiodine (RAI) therapy for hyperthyroidism patients in Asia. We herein investigated the real-world efficacy of single-dose RAI therapy in Taiwanese patients with Graves' disease (GD). METHODS This is a retrospective study of 243 patients with GD recorded between 1989 and 2016 in a tertiary referral hospital. Eu- or hypothyroid after RAI therapy were defined as the successful group. Kaplan-Meier curve and cox-regression model were used for analysis of prognostic factors. RESULTS Of the 243 patients, 187 were females, with mean age of 46.9 ± 13.6 years. Most patients (63.8%) did not choose RAI as the first-line therapy. The median dose was 7 mCi, with a mean follow-up period of 107.1 ± 82.8 months. The overall success rate was 70.9%. Univariate analysis revealed calculated- or fixed-dose (P = 0.015), goiter size (P < 0.001), and RAI dose (P = 0.022) were the factors affecting RAI effectiveness, multivariate analysis indicated goiter size was the independent factor. Patients with grade 0-2 goiter had a higher success rate than patients with grade 3 goiter (HR = 2.1, 95%CI = 1.34-3.27, P = 0.001), although the former were treated with lower RAI dose than the latter (7.8 ± 3.2 mCi vs 8.8 ± 3.3 mCi, P = 0.049). However, if the grade 3 goiters became smaller within 3 months of therapy, the success rate was not inferior to grade 0-2 goiter. CONCLUSION In Taiwan, RAI therapy for GD patients reached an overall success rate of 70.9%, with a median dose of 7 mCi. This study identified patients with grade 3 goiter need a more aggressive RAI regimen.
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Affiliation(s)
- Yi-Ting Yang
- Division of Metabolism, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan, ROC
| | - Jung-Fu Chen
- Division of Metabolism, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan, ROC
| | - Shih-Chen Tung
- Division of Metabolism, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan, ROC
| | - Ming-Chun Kuo
- Division of Metabolism, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan, ROC
| | - Shao-Wen Weng
- Division of Metabolism, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan, ROC
| | - Chen-Kai Chou
- Division of Metabolism, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan, ROC
| | - Feng-Chih Shen
- Division of Metabolism, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan, ROC
| | - Chih-Min Chang
- Division of Metabolism, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan, ROC
| | - Chia-Jen Tsai
- Division of Metabolism, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan, ROC
| | - Cheng-Feng Taso
- Division of Metabolism, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan, ROC
| | - Pei-Wen Wang
- Division of Metabolism, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan, ROC.
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Radioiodine Therapy for Benign Thyroid Disease. Clin Nucl Med 2020. [DOI: 10.1007/978-3-030-39457-8_28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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15
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Thou S, Vinjamuri S. The relationship between thyroid eye disease and radioiodine treatment. Nucl Med Commun 2019; 40:194-198. [DOI: 10.1097/mnm.0000000000000965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Aung ET, Zammitt NN, Dover AR, Strachan MWJ, Seckl JR, Gibb FW. Predicting outcomes and complications following radioiodine therapy in Graves' thyrotoxicosis. Clin Endocrinol (Oxf) 2019; 90:192-199. [PMID: 30291728 DOI: 10.1111/cen.13873] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 09/28/2018] [Accepted: 10/01/2018] [Indexed: 12/27/2022]
Abstract
OBJECTIVE Radioiodine (RAI) is an effective treatment for Graves' thyrotoxicosis but is associated with a failure rate of 15% and may be a risk factor for thyroid eye disease (TED) and weight gain. We sought to examine predictors of RAI failure, weight gain, TED and patient satisfaction. DESIGN Retrospective cohort study. PATIENTS A total of 655 episodes of RAI in Graves' thyrotoxicosis patients (2006-2015). MEASUREMENTS Biochemical assessment, including TFTs and thyrotropin receptor antibodies (TRAb), clinical features (eg, TED, weight and thionamide use) and patient questionnaire. RESULTS The treatment failure rate was 17%. Failure was greater with higher fT4 (P = 0.002) and higher TRAb (P = 0.004). Failure rate was 42.2% when TRAb >40 U/L. Median weight gain was 3.2 kg in those with normal fT4 prior to RAI and 5.8 kg when fT4 was elevated (P < 0.001). New TED developed in 7.6% but was not associated with post-RAI dysthyroidism. Treatment satisfaction was generally high (median response 8/10). CONCLUSIONS Treatment failure after RAI occurs in predictable groups and this should be reflected in the information provided to patients. Weight gain is common and may not entirely be explained by a return to pre-thyrotoxic baseline. We were unable to detect any significant impact of post-RAI dysthyroidism on weight gain, TED or thyroid symptoms in this large cohort.
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Affiliation(s)
- Ei Thuzar Aung
- Edinburgh Centre for Endocrinology and Diabetes, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - Nicola N Zammitt
- Edinburgh Centre for Endocrinology and Diabetes, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - Anna R Dover
- Edinburgh Centre for Endocrinology and Diabetes, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - Mark W J Strachan
- Edinburgh Centre for Endocrinology and Diabetes, Western General Hospital, Edinburgh, UK
| | - Jonathan R Seckl
- Edinburgh Centre for Endocrinology and Diabetes, Royal Infirmary of Edinburgh, Edinburgh, UK
- Centre for Cardiovascular Science, Queen's Medical Research Unit, University of Edinburgh, Edinburgh, UK
| | - Fraser W Gibb
- Edinburgh Centre for Endocrinology and Diabetes, Royal Infirmary of Edinburgh, Edinburgh, UK
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Hammes J, van Heek L, Hohberg M, Reifegerst M, Stockter S, Dietlein M, Wild M, Drzezga A, Schmidt M, Kobe C. Impact of different approaches to calculation of treatment activities on achieved doses in radioiodine therapy of benign thyroid diseases. EJNMMI Phys 2018; 5:32. [PMID: 30539323 PMCID: PMC6289932 DOI: 10.1186/s40658-018-0231-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 10/31/2018] [Indexed: 01/18/2023] Open
Abstract
Purpose Radioiodine has been used for the treatment of benign thyroid diseases for over 70 years. However, internationally, there is no common standard for pretherapeutic dosimetry to optimally define the individual therapy activity. Here, we analyze how absorbed tissue doses are influenced by different approaches to pretherapeutic activity calculation of varying complexity. Methods Pretherapeutic determination of treatment activity was retrospectively recalculated in 666 patients who had undergone radioiodine therapy for benign thyroid diseases (Graves’ disease, non-toxic goiter, and uni- and multinodular goiter). Approaches considering none, some, or all of a set of individual factors, including target volume, maximum radioiodine uptake, and effective half-life, were applied. Assuming individually stable radioiodine kinetics, which had been monitored twice a day under therapy, hypothetically achieved tissue doses based on hypothetically administered activities resulting from the different methods of activity calculation were compared to intended target doses. Results The Marinelli formula yields the smallest deviations of hypothetically achieved doses from intended target doses. Approaches taking individual target volume into consideration perform better than fixed therapy activities, which lead to high variances in achieved doses and high deviations of hypothetically achieved doses from intended target doses. Conclusion Elaborate pretherapeutic dose planning, taking individual radioiodine uptake, half-life, and target volume into consideration, should be used whenever possible. The use of disease-specific fixed activities cannot be recommended. Deviations of achieved tissue doses from target doses can already be significantly lowered by application of volume-adapted treatment activities if more elaborate means are not available.
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Affiliation(s)
- Jochen Hammes
- Department of Nuclear Medicine, University Hospital of Cologne, Kerpener Str. 62, 50937, Cologne, Germany.
| | - Lutz van Heek
- Department of Nuclear Medicine, University Hospital of Cologne, Kerpener Str. 62, 50937, Cologne, Germany
| | - Melanie Hohberg
- Department of Nuclear Medicine, University Hospital of Cologne, Kerpener Str. 62, 50937, Cologne, Germany
| | - Manuel Reifegerst
- Department of Nuclear Medicine, University Hospital of Cologne, Kerpener Str. 62, 50937, Cologne, Germany
| | - Simone Stockter
- Department of Nuclear Medicine, University Hospital of Cologne, Kerpener Str. 62, 50937, Cologne, Germany
| | - Markus Dietlein
- Department of Nuclear Medicine, University Hospital of Cologne, Kerpener Str. 62, 50937, Cologne, Germany
| | - Markus Wild
- Department of Nuclear Medicine, University Hospital of Cologne, Kerpener Str. 62, 50937, Cologne, Germany
| | - Alexander Drzezga
- Department of Nuclear Medicine, University Hospital of Cologne, Kerpener Str. 62, 50937, Cologne, Germany
| | - Matthias Schmidt
- Department of Nuclear Medicine, University Hospital of Cologne, Kerpener Str. 62, 50937, Cologne, Germany
| | - Carsten Kobe
- Department of Nuclear Medicine, University Hospital of Cologne, Kerpener Str. 62, 50937, Cologne, Germany
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Corvilain B, Hamy A, Brunaud L, Borson-Chazot F, Orgiazzi J, Bensalem Hachmi L, Semrouni M, Rodien P, Lussey-Lepoutre C. Treatment of adult Graves' disease. ANNALES D'ENDOCRINOLOGIE 2018; 79:618-635. [PMID: 30193753 DOI: 10.1016/j.ando.2018.08.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Treatment strategy in Graves' disease firstly requires recovery of euthyroid status by antithyroid therapy. Treatment modalities, precautions, advantages and side-effects are to be discussed with the patient. No particular treatment modality has demonstrated superiority. Pregnancy or pregnancy project affects choice of treatment and monitoring. Graves' orbitopathy is liable to be aggravated by iodine-131 treatment and requires pre-treatment assessment. Iodine-131 treatment aims at achieving hypothyroidism. Thyroid surgery for Graves' disease should preferably be performed by an expert team. In case of recurrence of hyperthyroidism, the various treatment options should be discussed with the patient. Empiric treatment of thyroid dermopathy uses local corticosteroids in occlusive dressing.
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Affiliation(s)
- Bernard Corvilain
- Department of Endocrinology, Erasme University Hospital, université Libre de Bruxelles, Brussels, Belgium
| | - Antoine Hamy
- Service de chirurgie viscérale et endocrine, CHU d'Angers, 49000 Angers, France
| | - Laurent Brunaud
- Service de chirurgie, unité de chirurgie endocrinienne, thyroïdienne et métabolique, unité multidisciplinaire de chirurgie de l'obésité, université de Lorraine, CHU Nancy, hôpital Brabois adultes, 11, allée du Morvan, 54511 Vandœuvre-les-Nancy, France
| | - Françoise Borson-Chazot
- HESPER EA 7425, hospices civils de Lyon, fédération d'endocrinologie, université Claude-Bernard Lyon 1, 69008 Lyon, France
| | - Jacques Orgiazzi
- CERMEP-imagerie du vivant, université Claude-Bernard Lyon 1, Lyon, France
| | - Leila Bensalem Hachmi
- Service d'endocrinologie à l'Institut national de nutrition de Tunis, faculté de médecine de Tunis, Tunisia
| | | | - Patrice Rodien
- Service EDN, centre de référence des maladies rares de la thyroïde et des récepteurs hormonaux, CHU d'Angers, 49000 Angers, France.
| | - Charlotte Lussey-Lepoutre
- Service de médecine nucléaire, Inserm U970, Sorbonne université, groupe hospitalier Pitié-Salpétrière, 75013 Paris, France
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Abstract
Introduction 131I therapy is a choice for Graves’ hyperthyroidism. Several factors that affect the success of 131I treatment in Graves’ disease (GD) patients have been put forward. The aim of this retrospective study was to evaluate the factors influencing the success of 131I therapy and the occurrence of hypothyroidism after 131I therapy. Patients and methods We reviewed 325 GD patients, who were well documented out of 779 cases, treated with 131I in the First Affiliated Hospital of Xi’an Jiaotong University between 2010 and 2016. We collected the potential influencing factors, including demographic data (age, sex, family history), iodine intake state, antithyroid drugs (ATD) taking, thyroid texture, complications of hyperthyroidism, physical and laboratory examinations [thyroid weight, effective 131I half-life time (Teff), 24-h iodine uptake rate, tri-iodothyronine, thyroxine, free tri-iodothyronine (FT3), free thyroxine, thyroid-stimulating hormone, thyroglobulin antibody, thyroid microsome antibody, thyrotropin receptor antibody], and final administered dosages according to Quimby formula. The correlations between the prognosis of GD patients and these factors were analyzed by logistic regression analysis. Results Out of 325 patients, 247 (76.00%) were treated successfully with radioiodine. GD patients who were cured by 131I therapy were more likely to have smaller thyroid [odds ratio (OR)=0.988, 95% confidence interval (CI)=0.980–0.996, P=0.002], lower FT4 levels (OR=0.993, 95% CI=0.988–0.997, P=0.002), and shorter time of ATD withdrawal before 131I treatment (OR=0.985, 95% CI=0.975–0.996, P=0.002). Hypothyroidism occurred in 132 (41.00%) out of 325 patients. There was an increased risk of early hypothyroidism in patients with lower 24-h iodine uptake (OR=0.964, 95% CI=0.941–0.988, P=0.004), and treated with a lower total dose of iodine (OR=0.892, 95% CI=0.824–0.965, P=0.005) and a higher iodine dose per garm of thyroid tissue (OR=5.414E+14, 95% CI=45.495–6.444E+27, P=0.027). Conclusion Our results showed that 131I treatment was more successful in patients with lower weight of the thyroid, lower free thyroxine level, and shorter ATD taking period. Furthermore, early hypothyroidism after radioiodine treatment was more likely to occur in patients with lower 24-h iodine uptake, lower total dose of iodine, and higher iodine dose per garm of thyroid tissue.
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Giesecke P, Frykman V, Wallin G, Lönn S, Discacciati A, Törring O, Rosenqvist M. All-cause and cardiovascular mortality risk after surgery versus radioiodine treatment for hyperthyroidism. Br J Surg 2017; 105:279-286. [DOI: 10.1002/bjs.10665] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 05/24/2017] [Accepted: 07/09/2017] [Indexed: 11/05/2022]
Abstract
Abstract
Background
Little is known about the long-term side-effects of different treatments for hyperthyroidism. The few studies previously published on the subject either included only women or focused mainly on cancer outcomes. This register study compared the impact of surgery versus radioiodine on all-cause and cause-specific mortality in a cohort of men and women.
Methods
Healthcare registers were used to find hyperthyroid patients over 35 years of age who were treated with radioiodine or surgery between 1976 and 2000. Comparisons between treatments were made to assess all-cause and cause-specific deaths to 2013. Three different statistical methods were applied: Cox regression, propensity score matching and inverse probability weighting.
Results
Of the 10 992 patients included, 10 250 had been treated with radioiodine (mean age 65·1 years; 8668 women, 84·6 per cent) and 742 had been treated surgically (mean age 44·1 years; 633 women, 85·3 per cent). Mean duration of follow-up varied between 16·3 and 22·3 years, depending on the statistical method used. All-cause mortality was significantly lower among surgically treated patients, with a hazard ratio of 0·82 in the regression analysis, 0·80 in propensity score matching and 0·85 in inverse probability weighting. This was due mainly to lower cardiovascular mortality in the surgical group. Men in particular seemed to benefit from surgery compared with radioiodine treatment.
Conclusion
Compared with treatment with radioiodine, surgery for hyperthyroidism is associated with a lower risk of all-cause and cardiovascular mortality in the long term. This finding was more evident among men.
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Affiliation(s)
- P Giesecke
- Department of Clinical Sciences, Danderyd Hospital, Karolinska Institute, Stockholm, Sweden
| | - V Frykman
- Department of Clinical Sciences, Danderyd Hospital, Karolinska Institute, Stockholm, Sweden
| | - G Wallin
- Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden
- Department of Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - S Lönn
- Department of Research and Development, Region Halland, Halmstad, Sweden
| | - A Discacciati
- Unit of Biostatistics, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
| | - O Törring
- Department of Clinical Research and Education, Karolinska Institute, Stockholm, Sweden
| | - M Rosenqvist
- Department of Clinical Sciences, Danderyd Hospital, Karolinska Institute, Stockholm, Sweden
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Tabuenca-Dopico O, Boente-Varela R, Lamas-Ferreiro J. Study of factors that influence the outcome of 131 I treatment in hyperthyroidism secondary to nodular goitre. Rev Esp Med Nucl Imagen Mol 2017. [DOI: 10.1016/j.remnie.2017.09.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Tabuenca-Dopico O, Boente-Varela R, Lamas-Ferreiro JL. Study of factors that influence the outcome of 131I treatment in hyperthyroidism secondary to nodular goitre. Rev Esp Med Nucl Imagen Mol 2017; 36:356-361. [PMID: 28619420 DOI: 10.1016/j.remn.2017.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 03/08/2017] [Accepted: 03/27/2017] [Indexed: 10/19/2022]
Abstract
OBJECTIVE To assess the outcome after 131I treatment in patients with multinodular (MNG) and nodular toxic goitre (NTG) according to the administered dose and other factors related to the patient, pathology, or previous treatments. MATERIAL AND METHODS A retrospective study was conducted on 108 patients (67 MNG and 41 NTG) treated in our department, with a follow-up period of at least 2 years. Development of hypothyroidism and treatment failure were evaluated along with their relationship with the administered dose and other factors such as age, sex, grade of hyperthyroidism, type of goitre, presence of autoimmunity, or previous antithyroid medication. RESULTS More than one-third (36.9%) of MNG patients, and even higher proportion of NTG patients (51.2%) developed non-transient hypothyroidism, particularly in those receiving 740MBq (66.7%). No relationship was found with any other variable. The development of early hypothyroidism (before one year) was also not related to any variable. Treatment failure was not related to the dose, but in MNG there was a relationship with male gender, presence of autoimmunity, or previous antithyroid drugs use. CONCLUSIONS The high rate of hypothyroidism obtained with high doses of 131I in hyperthyroidism secondary to nodular goitre treatment suggests that lower doses might be sufficient to control the disease without an increase in treatment failures. Only patients with positive autoimmunity, in previous anti-thyroid medication, and perhaps male gender in MNG might be given higher doses, as the failure rate increases, but further studies are required.
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Malaguarnera R, Vella V, Nicolosi ML, Belfiore A. Insulin Resistance: Any Role in the Changing Epidemiology of Thyroid Cancer? Front Endocrinol (Lausanne) 2017; 8:314. [PMID: 29184536 PMCID: PMC5694441 DOI: 10.3389/fendo.2017.00314] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 10/30/2017] [Indexed: 12/13/2022] Open
Abstract
In the past few decades, the incidence of thyroid cancer (TC), namely of its papillary hystotype (PTC), has shown a steady increase worldwide, which has been attributed at least in part to the increasing diagnosis of early stage tumors. However, some evidence suggests that environmental and lifestyle factors can also play a role. Among the potential risk factors involved in the changing epidemiology of TC, particular attention has been drawn to insulin-resistance and related metabolic disorders, such as obesity, type 2 diabetes, and metabolic syndrome, which have been also rapidly increasing worldwide due to widespread dietary and lifestyle changes. In accordance with this possibility, various epidemiological studies have indeed gathered substantial evidence that insulin resistance-related metabolic disorders might be associated with an increased TC risk either through hyperinsulinemia or by affecting other TC risk factors including iodine deficiency, elevated thyroid stimulating hormone, estrogen-dependent signaling, chronic autoimmune thyroiditis, and others. This review summarizes the current literature evaluating the relationship between metabolic disorders characterized by insulin resistance and the risk for TC as well as the possible underlying mechanisms. The potential implications of such association in TC prevention and therapy are discussed.
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Affiliation(s)
- Roberta Malaguarnera
- Endocrinology, Department of Health Sciences, University Magna Graecia of Catanzaro, Catanzaro, Italy
| | - Veronica Vella
- School of Human and Social Sciences, “Kore” University of Enna, Enna, Italy
- *Correspondence: Veronica Vella, ; Antonino Belfiore,
| | - Maria Luisa Nicolosi
- Endocrinology, Department of Health Sciences, University Magna Graecia of Catanzaro, Catanzaro, Italy
| | - Antonino Belfiore
- Endocrinology, Department of Health Sciences, University Magna Graecia of Catanzaro, Catanzaro, Italy
- *Correspondence: Veronica Vella, ; Antonino Belfiore,
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Boelaert K. WOMEN IN CANCER PROFILE: From bedside to bench and back: my journey in thyroid disease. Endocr Relat Cancer 2016; 23:P9-P13. [PMID: 27633515 DOI: 10.1530/erc-16-0396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 09/15/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Kristien Boelaert
- Reader in EndocrinologyInstitute of Metabolism and Systems Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
- Centre for EndocrinologyDiabetes and Metabolism, Birmingham Health Partners, Birmingham, UK
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Hookham J, Truran P, Allahabadia A, Balasubramanian SP. Patients’ perceptions and views of surgery and radioiodine ablation in the definitive management of Graves’ disease. Postgrad Med J 2016; 93:266-270. [DOI: 10.1136/postgradmedj-2015-133756] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 08/27/2016] [Indexed: 12/21/2022]
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Abstract
Hyperthyroidism is characterised by increased thyroid hormone synthesis and secretion from the thyroid gland, whereas thyrotoxicosis refers to the clinical syndrome of excess circulating thyroid hormones, irrespective of the source. The most common cause of hyperthyroidism is Graves' disease, followed by toxic nodular goitre. Other important causes of thyrotoxicosis include thyroiditis, iodine-induced and drug-induced thyroid dysfunction, and factitious ingestion of excess thyroid hormones. Treatment options for Graves' disease include antithyroid drugs, radioactive iodine therapy, and surgery, whereas antithyroid drugs are not generally used long term in toxic nodular goitre, because of the high relapse rate of thyrotoxicosis after discontinuation. β blockers are used in symptomatic thyrotoxicosis, and might be the only treatment needed for thyrotoxicosis not caused by excessive production and release of the thyroid hormones. Thyroid storm and hyperthyroidism in pregnancy and during the post-partum period are special circumstances that need careful assessment and treatment.
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Affiliation(s)
- Simone De Leo
- Endocrine Unit, Fondazione IRCCS Cà Granda, Milan, Italy (S De Leo MD); Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy (S De Leo); and Section of Endocrinology, Diabetes and Nutrition, Boston University School of Medicine, Boston, MA, USA (S De Leo, S Y Lee MD, Prof L E Braverman MD)
| | - Sun Y Lee
- Endocrine Unit, Fondazione IRCCS Cà Granda, Milan, Italy (S De Leo MD); Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy (S De Leo); and Section of Endocrinology, Diabetes and Nutrition, Boston University School of Medicine, Boston, MA, USA (S De Leo, S Y Lee MD, Prof L E Braverman MD)
| | - Lewis E Braverman
- Endocrine Unit, Fondazione IRCCS Cà Granda, Milan, Italy (S De Leo MD); Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy (S De Leo); and Section of Endocrinology, Diabetes and Nutrition, Boston University School of Medicine, Boston, MA, USA (S De Leo, S Y Lee MD, Prof L E Braverman MD)
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ACR Practice Parameter for the Performance of Therapy With Unsealed Radiopharmaceutical Sources. Clin Nucl Med 2016; 41:106-17. [DOI: 10.1097/rlu.0000000000001036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
OBJECTIVE The first dose of radioiodine (I) does not always cure hyperthyroidism in patients with Graves' disease (GD). Our aim was to evaluate the factors influencing the success of I therapy. PATIENTS AND METHODS We reviewed the medical records of 724 patients who were first diagnosed with GD between 2005 and 2009 and were subsequently treated with I in a fixed-dose manner considering the thyroid volume (TV). TSH, fT(4), and fT(3) were measured. TV was measured by means of ultrasonography. Successful therapy was followed by euthyroidism or hypothyroidism. RESULTS Out of 724 patients, 656 (90.5%) were successfully (Group 1) and 69 (9.5%) were unsuccessfully (Group 2) treated with the first dose of (131)I. In Group 1, the applied dose of (131)I was lower than that in Group 2 [626±107, 95% confidence interval (CI) 618-634, and 709±140, 95% CI 675-742 MBq, respectively; P<0.001]. At presentation, patients in Group 1 were younger than those in Group 2 (45.5±14.9, 95% CI 44.4-46.6, and 50.1±15.8, 95% CI 46.3-53.9 years, respectively; P=0.031). They had a lower fT(4) (54.9±26.1, 95% CI 52.9-56.9, and 72.1±34.1, 95% CI 63.9-80.3 pmol/l, respectively; P<0.001), a lower fT3 (20.9±8.2, 95% CI 20.3-21.5, and 23.9±8.2, 95% CI 21.9-25.9 pmol/l, respectively; P<0.001), and a smaller TV (21.5±13.2, 95% CI 20.2-22.8, and 35.6±22.3, 95% CI 28.2-42.9 ml, respectively; P<0.001). Before I therapy, patients in Group 1 had a lower fT(3) (9.6±6.0, 95% CI 9.2-10.1, and 11.3±7.6, 95% CI 9.5-13.2 pmol/l, respectively; P=0.038). CONCLUSION Successfully treated GD patients were younger, less severely hyperthyroid, and had a smaller TV at presentation. They were also less severely hyperthyroid before I therapy.
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Tamatea JAU, Conaglen JV, Elston MS. Response to Radioiodine Therapy for Thyrotoxicosis: Disparate Outcomes for an Indigenous Population. Int J Endocrinol 2016; 2016:7863867. [PMID: 27446210 PMCID: PMC4942658 DOI: 10.1155/2016/7863867] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 05/22/2016] [Indexed: 11/18/2022] Open
Abstract
Despite 70 years of experience treating thyrotoxic patients with radioiodine not all patients are successfully treated by a single dose. Multiple factors predicting radioiodine efficacy have been reported. The aim of this study was to assess whether ethnicity was associated with radioiodine response. A retrospective review was performed of patients who received radioiodine therapy for thyrotoxicosis from 1 January 2008 to 31 December 2010 and had follow-up available of a minimum of 12 months. 224 patients were included, 82.4% female, and 63.7% had Graves's disease. Radioiodine failed in 21.5% of patients overall, with a higher failure rate in the indigenous population (35.2%). When controlling for other influencing factors by logistic regression, there continued to be an increased risk for the indigenous group (OR 2.82) and those treated with antithyroid drugs following radioiodine (OR 2.04). Younger age was also associated with an increased risk of failing radioiodine therapy (OR 0.97 for each year of age). Cure rates following radioiodine were lower for indigenes independent of factors known to affect radioiodine outcome. This is the first report demonstrating ethnicity as a possible independent variable for radioiodine efficacy. Further work is needed to investigate the cause of this difference.
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Affiliation(s)
- Jade A. U. Tamatea
- University of Auckland, Waikato Clinical Campus, Private Bag 3200, Hamilton 3240, New Zealand
- *Jade A. U. Tamatea:
| | - John V. Conaglen
- University of Auckland, Waikato Clinical Campus, Private Bag 3200, Hamilton 3240, New Zealand
| | - Marianne S. Elston
- University of Auckland, Waikato Clinical Campus, Private Bag 3200, Hamilton 3240, New Zealand
- Department of Endocrinology, Waikato Hospital, Private Bag 3200, Hamilton 3240, New Zealand
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Santarosa VA, Orlandi DM, Fiorin LB, Kasamatsu TS, Furuzawa GK, Kunii IS, Padovani RP, Marone MMS, Castiglioni ML, Vieira JGH, Maciel RMB, Dias-da-Silva MR, Martins JRM. Low iodine diet does not improve the efficacy of radioiodine for the treatment of Graves’ disease. ARCHIVES OF ENDOCRINOLOGY AND METABOLISM 2015; 59:501-6. [DOI: 10.1590/2359-3997000000082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 06/18/2015] [Indexed: 11/22/2022]
Affiliation(s)
| | | | | | | | | | | | - Rosália P. Padovani
- Universidade Federal de São Paulo, Brasil; Irmandade Santa Casa de Misericórdia de São Paulo, Brasil
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Şakı H, Cengiz A, Yürekli Y. Effectiveness of Radioiodine Treatment for Toxic Nodular Goiter. Mol Imaging Radionucl Ther 2015; 24:100-4. [PMID: 27529884 PMCID: PMC4745401 DOI: 10.4274/mirt.48378] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
OBJECTIVE The aim of this retrospective study is to evaluate the treatment outcomes in patients with toxic nodular goiter (TNG) that received radioiodine treatment (RAIT) and to determine the influence of age, gender, nodule size, I-131 dose, underlying etiology and antithyroid drugs on the outcomes of RAIT. METHODS Two hundred thirty three patients (mean 64±10 years old) with TNG that received RAIT were included in the study. Treatment success was analyzed according to demographic (age and gender) and clinical data (thyroid function tests before and after RAIT, thyroid sonography and scintigraphy, I-131 dose, antithyroid drugs). A fixed dose of 555 MBq was administered to patients with nodules smaller than 2 cm in diameter and of 740 MBq to patients with nodules larger than 2 cm. Hyperthyroidism treatment success was defined as achieving hypothyroidism or euthyroidism six months after RAIT. RESULTS In our study, the cure rate was 93.9% six months after RAIT. Hypothyroidism was observed in 74 (31.7%) patients, and euthyroidism was achieved in 145 (62.2%) patients while 14 (6%) patients remained in hyperthyroid state. Age and gender did not affect treatment outcomes. No correlation was found between underlying etiology or antithyroid drugs and therapeutic effectiveness. The effectiveness of RAIT was better in patients with nodules smaller than 2 cm. CONCLUSION We observed that high cure rates were obtained in patients with TNG with 555 MBq and 740 MBq doses of I-131. While nodule diameter and RAI dose are important factors for treatment efficacy; age, gender, underlying etiology and antithyroid drugs do not affect the outcome of RAIT.
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Affiliation(s)
| | - Arzu Cengiz
- Adnan Menderes University Faculty of Medicine, Department of Nuclear Medicine, Aydın, Turkey Phone: +90 256 444 12 56 E-mail:
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Abstract
BACKGROUND AND AIMS Accurate diagnosis and treatment of subclinical hypothyroidism (SCH) is challenging in clinical practice because of differing upper limits of normal (ULN) for thyroid-stimulating hormone (TSH). This review summarises the various definitions of SCH and their impact on reported SCH prevalence. METHODOLOGY Articles reporting the prevalence of SCH in relation to the ULN of TSH in human studies were identified through an English-language PubMed search for 'subclinical hypothyroidism,' 'prevalence,' and 'TSH' within the title and/or abstract. Relevant articles and related literature were selected for inclusion. RESULTS Estimates for the prevalence of SCH varied by sex, age, race/ethnicity, and geographic location (range, 0.4-16.9%). Higher rates of SCH were consistently reported in women (0.9-16.9%) and older individuals (2.7-16.9%). However, the ULN of TSH in those considered free of thyroid disease and not at risk increased progressively with age, suggesting that reports of SCH prevalence in elderly people may be overestimated. Multiple studies reported an increased risk of progression to overt hypothyroidism among individuals with elevated TSH and antithyroid antibodies. CONCLUSIONS Given the variable definition of SCH based on an inconsistent ULN for TSH, it is currently difficult to ascertain the true prevalence of SCH and to correctly label and treat patients with SCH; use of age-adjusted definitions may be considered when assessing prevalence. A diagnosis of SCH does not necessarily merit treatment, especially if TSH elevations are transient (i.e. not persistent for > 3-6 months) and the patient lacks other risk factors for developing overt hypothyroidism.
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Affiliation(s)
- J V Hennessey
- Division of Endocrinology, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - R Espaillat
- Global Medical Affairs, AbbVie Inc., North Chicago, IL, USA
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Radioactive Iodine Therapy and Thyroid Eye Disease From an Ophthalmologist’s Perspective. Clin Ophthalmol 2015; 55:63-72. [DOI: 10.1097/iio.0000000000000079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Cepková J, Horáček J, Vižďa J, Doležal J. Radioiodine treatment of Graves' disease - dose/response analysis. ACTA MEDICA (HRADEC KRÁLOVÉ) 2014; 57:49-55. [PMID: 25257150 DOI: 10.14712/18059694.2014.39] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The clinical outcome of 153 Graves' disease patients treated with a wide dose range of radioactive iodine-131 (RAI) was analyzed retrospectively. Six to nine months after the first dose of RAI 60 patients (39%) were hypothyroid (or rather thyroxine-substituted) and 26 (17%) were euthyroid, while 67 patients (44%) did not respond properly: in 32 (21%) their antithyroid drug (ATD) dose could be reduced but not withdrawn (partial response) and 35 (23%) remained hyperthyroid or the same dose of ATD was necessary (no response). The outcome did not correspond significantly to the administered activity of RAI (medians 259, 259, 222, and 259 MBq for hypothyroid, euthyroid, partial, and no response subgroups, respectively), or the activity retained in the gland at 24 h (medians 127, 105, 143, and 152 MBq). The effect was, however, clearly, and in a stepwise pattern, dependent on initial thyroid volume (17, 26, 33 and 35 ml, P < 0.001) or activity per gram tissue retained at 24 h (6.02, 4.95, 4.75, and 4.44 MBq/g, P = 0.002). Also, higher residual level of thyrotoxicosis at the time of RAI treatment was connected with worse outcome. The dose-dependency of outcome was further analyzed. When our sample was divided into tertiles, according to the adjusted dose, the same modest success rates (47%) were seen in the lower and middle tertiles. However, doses higher than 5.88 MBq/g (the upper tertile) resulted in success rate of 75%. Finer division into decils has shown a threshold-like increase in cure rate between the 7th and the 8th decil. In the first 7 decils (doses ≤ 6 MBq/g) the complete response rate was 45 to 50%, in the 8th decil (6.0 to 7.8~MBq/g) it rose to 80% and was not further increased with increasing dose. Direct comparison of higher (> 6 MBq/g, cure rate 80%) and lower (≤ 6 MBq/g, cure rate 46%) doses gave highly significant difference (P < 0.001). With our dosing range we found a dose-dependent clinical outcome that suggests an optimum delivered dose near 6.5 MBq/g, resulting in successful treatment of ca 80% patients.
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Affiliation(s)
- Jitka Cepková
- University Hospital Hradec Králové, Charles University in Prague, Faculty of Medicine in Hradec Králové, Czech Republic: 4th Department of Internal Medicine - Hematology
| | - Jiří Horáček
- University Hospital Hradec Králové, Charles University in Prague, Faculty of Medicine in Hradec Králové, Czech Republic: 4th Department of Internal Medicine - Hematology.
| | - Jaroslav Vižďa
- University Hospital Hradec Králové, Charles University in Prague, Faculty of Medicine in Hradec Králové, Czech Republic: Department of Nuclear Medicine
| | - Jiří Doležal
- University Hospital Hradec Králové, Charles University in Prague, Faculty of Medicine in Hradec Králové, Czech Republic: Department of Nuclear Medicine
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Lingudu B, Bongi V, Ayyagari M, Venkata SKA. Impact of lithium on radioactive iodine therapy for hyperthyroidism. Indian J Endocrinol Metab 2014; 18:669-675. [PMID: 25285284 PMCID: PMC4171890 DOI: 10.4103/2230-8210.139230] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
CONTEXT Radioactive Iodine (RAI) is a common therapy for hyperthyroidism. However hyperthyroidism recurs or persists in 15-18% of patients after RAI. Studies report variable percentage of failure after RAI therapy depending on several variables including I(131). Lithium enhances efficacy of treatment by increasing RAI retention in the thyroid. AIMS To evaluate the efficacy of Lithium to RAI therapy in terms of cure, reduction of mean thyroid volume, and its safety. SETTINGS AND DESIGN A prospective comparative study. SUBJECTS AND METHODS Forty hyperthyroid patients were assigned to two groups, RAI alone and RAI plus lithium and followed for 1 year. Lithium was given in a dose of 900 mg/day in three divided doses for 6 days starting on the day of RAI therapy. Total T3, total T4, and thyroid-stimulating hormone (TSH) were done at baseline, 2,4,6,9, and 12 months. Ultrasound of thyroid was done at baseline and at the end of 1 year. Monitoring was done for side effects of lithium and RAI therapy. STATISTICAL ANALYSIS Cure rate and time to cure were assessed by Chi-square test. Mean change in thyroid volume was compared by student's t-test. P < 0.05 was considered significant. RESULTS RAI combined with lithium had a trend towards better cure rate (90%) compared to RAI alone (70%) (P 0.11). Mean time taken to cure was 4.69 months in RAI plus lithium and 7.12 months in RAI alone (P 0.001). Mean change in thyroid volume was similar in both the groups (P = 0.75). There were no side effects of Lithium or RAI. CONCLUSIONS RAI therapy combined with lithium showed a trend towards higher cure rate, safe and time to cure was less than RAI alone. Hence RAI combined with lithium is a better option in the management of hyperthyroidism than RAI alone.
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Affiliation(s)
- Brahmanandam Lingudu
- Department of Endocrinology, Andhra Medical College, King George Hospital, Visakhapatnam, Andhra pradesh, India
| | - Vivekanand Bongi
- Department of Endocrinology, Andhra Medical College, King George Hospital, Visakhapatnam, Andhra pradesh, India
| | - Mythili Ayyagari
- Department of Endocrinology, Andhra Medical College, King George Hospital, Visakhapatnam, Andhra pradesh, India
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Maia AL, Scheffel RS, Meyer ELS, Mazeto GMFS, Carvalho GAD, Graf H, Vaisman M, Maciel LMZ, Ramos HE, Tincani AJ, Andrada NCD, Ward LS. The Brazilian consensus for the diagnosis and treatment of hyperthyroidism: recommendations by the Thyroid Department of the Brazilian Society of Endocrinology and Metabolism. ACTA ACUST UNITED AC 2014; 57:205-32. [PMID: 23681266 DOI: 10.1590/s0004-27302013000300006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Accepted: 03/19/2013] [Indexed: 03/20/2023]
Abstract
INTRODUCTION Hyperthyroidism is characterized by increased synthesis and release of thyroid hormones by the thyroid gland. Thyrotoxicosis refers to the clinical syndrome resulting from excessive circulating thyroid hormones, secondary to hyperthyroidism or due to other causes. This article describes evidence-based guidelines for the clinical management of thyrotoxicosis. OBJECTIVE This consensus, developed by Brazilian experts and sponsored by the Department of Thyroid Brazilian Society of Endocrinology and Metabolism, aims to address the management, diagnosis and treatment of patients with thyrotoxicosis, according to the most recent evidence from the literature and appropriate for the clinical reality of Brazil. MATERIALS AND METHODS After structuring clinical questions, search for evidence was made available in the literature, initially in the database MedLine, PubMed and Embase databases and subsequently in SciELO - Lilacs. The strength of evidence was evaluated by Oxford classification system was established from the study design used, considering the best available evidence for each question. RESULTS We have defined 13 questions about the initial clinical approach for the diagnosis and treatment that resulted in 53 recommendations, including the etiology, treatment with antithyroid drugs, radioactive iodine and surgery. We also addressed hyperthyroidism in children, teenagers or pregnant patients, and management of hyperthyroidism in patients with Graves' ophthalmopathy and various other causes of thyrotoxicosis. CONCLUSIONS The clinical diagnosis of hyperthyroidism usually offers no difficulty and should be made with measurements of serum TSH and thyroid hormones. The treatment can be performed with antithyroid drugs, surgery or administration of radioactive iodine according to the etiology of thyrotoxicosis, local availability of methods and preferences of the attending physician and patient.
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Affiliation(s)
- Ana Luiza Maia
- Unidade de Tireoide, Serviço de Endocrinologia, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil.
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Larcos GS, Collins LT, Georgiou A, Westbrook JI. Maladministrations in nuclear medicine: revelations from the Australian Radiation Incident Register. Med J Aust 2014; 200:37-40. [PMID: 24438417 DOI: 10.5694/mja13.10145] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Accepted: 09/23/2013] [Indexed: 11/17/2022]
Abstract
OBJECTIVE To describe the incidence, type, causes and consequences of nuclear medicine maladministrations. SETTING AND PARTICIPANTS Review of prospectively acquired maladministration reports within the Australian Radiation Incident Register (ARIR), a mandatory incident register managed by the Australian Radiation Protection and Nuclear Safety Agency. MAIN OUTCOME MEASURES Individual reports from 2007 to 2011 were evaluated for dose of radiation exposure and type, cause and consequence of maladministrations. Incidence was estimated using data from Medicare Australia. RESULTS There were 149 maladministrations and the estimated incidence was 5.8 per 100,000 nuclear medicine procedures (95% CI, 5.0-6.9). About half of all maladministrations (48%) arose from an incorrect radiopharmaceutical being prepared and/or dispensed. Other causes included mistakenly injecting the wrong radiopharmaceutical because of inattention (n = 27; 18.1%); extravasations, failures in equipment or procedure leading to a non-diagnostic study (n = 25; 16.8%); misinterpreting a request form and performing an incorrect procedure (n = 13; 8.7%); or injecting an incorrect patient (n = 13; 8.7%). ARIR reports focused on active rather than latent causes. Most (n = 147) maladministrations occurred following diagnostic procedures, and the mean effective radiation dose was 7.9 mSv (range, 0.015-45 mSv). Two therapeutic maladministrations likely caused unintended organ injury. CONCLUSIONS The ARIR provides unique insight into the type, causes and complications of maladministrations in Australia. Nearly all maladministrations occur in a diagnostic context, and the risk of patient harm appears low. Among active causes, radiopharmaceutical preparation and dispensation, and medical supervision before injection merit attention. The ARIR could be refined by attending to latent errors, addressing possible underreporting and securing more complete Medicare data.
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Affiliation(s)
- George S Larcos
- Nuclear Medicine and Ultrasound, Westmead Hospital, Sydney, NSW, Australia.
| | - Lee T Collins
- Nuclear Medicine and Ultrasound, Westmead Hospital, Sydney, NSW, Australia
| | - Andrew Georgiou
- Centre for Health Systems and Safety Research, Australian Institute of Health Innovation, University of New South Wales, Sydney, NSW, Australia
| | - Johanna I Westbrook
- Centre for Health Systems and Safety Research, Australian Institute of Health Innovation, University of New South Wales, Sydney, NSW, Australia
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Namwongprom S, Unachak K, Dejkhamron P, Ua-apisitwong S, Ekmahachai M. Radioactive iodine for thyrotoxicosis in childhood and adolescence: treatment and outcomes. J Clin Res Pediatr Endocrinol 2013; 5:95-7. [PMID: 23748061 PMCID: PMC3701929 DOI: 10.4274/jcrpe.951] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
OBJECTIVE The aim of the present study was to evaluate the outcome of radioiodine treatment in thyrotoxicosis in childhood and adolescence. METHODS This was a retrospective study of 27 patients (ages 7.2- 19.8 years) with a diagnosis of thyrotoxicosis who received iodine-131 (I-131) treatment from January 2007 to December 2011 in the Nuclear Medicine Division, Department of Radiology, Faculty of Medicine, Chiang Mai University. Gender, duration of antithyroid drug (ATD) treatment, 24-hour I-131 uptake, thyroid weight, total dose and number of treatments with I-131, and thyroid status at 6 months after treatment were recorded. RESULTS The outcomes of 27 patients (85.2% female, 14.8% male) treated with radioactive iodine were analyzed to assess the effectiveness of therapy as related to dose and gland size. All children and adolescents received 150 µCi of I-131/g of thyroid tissue (n=27). Six 6 months after treatment, 44.5% of the patients were hyperthyroid, 14.8% were euthyroid, and 40.7% were hypothyroid. Of the 12 cases with hyperthyroidism, 2 cases needed a second dose of I-131 treatment, and they finally reached a hypothyroid state. The patients were classified into 2 groups according to treatment success (euthyroid and hypothyroid) and treatment failure (hyperthyroid). There were no significant differences in age, gender, duration of ATD treatment, 2- and 24-hour I-131 uptake, thyroid weight, and total I-131 dose between these two groups. CONCLUSIONS Radioiodine treatment is safe and effective for thyrotoxicosis in childhood and adolescence. It is suitable as a good second-line therapy for patients with severe complications, those who show poor compliance, and those who fail to respond to ATD treatment.
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Affiliation(s)
- Sirianong Namwongprom
- Chiang Mai University, Faculty of Medicine, Department of Radiology, Chiang Mai, Thailand.
| | - Kevalee Unachak
- Chiang Mai University Faculty of Medicine, Department of Pediatrics, Chiang Mai, Thailand
| | - Prapai Dejkhamron
- Chiang Mai University Faculty of Medicine, Department of Pediatrics, Chiang Mai, Thailand
| | - Supoj Ua-apisitwong
- Chiang Mai University, Faculty of Medicine, Department of Radiology, Chiang Mai, Thailand
| | - Molrudee Ekmahachai
- Chiang Mai University, Faculty of Medicine, Department of Radiology, Chiang Mai, Thailand
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Boelaert K, Maisonneuve P, Torlinska B, Franklyn JA. Comparison of mortality in hyperthyroidism during periods of treatment with thionamides and after radioiodine. J Clin Endocrinol Metab 2013; 98:1869-82. [PMID: 23543662 DOI: 10.1210/jc.2012-3459] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
CONTEXT Hyperthyroidism is common, but opinions regarding optimal therapy with antithyroid drugs or radioiodine (131-I) differ. There are no randomized trials comparing these options in terms of mortality. OBJECTIVE The aim of the study was to determine whether mortality associated with hyperthyroidism varies with treatment administered or other factors. DESIGN, SETTING, AND PATIENTS We conducted a prospective observational population-based study of 1036 subjects aged ≥ 40 years presenting to a single specialist clinic from 1989-2003 with a first episode of hyperthyroidism who were followed until June 2012. INTERVENTIONS Antithyroid drugs or radioiodine (131-I) were administered. MAIN OUTCOME MEASURES We compared causes of death with age-, sex-, and period-specific mortality in England and Wales and used within-cohort analysis of influence of treatment modality, outcome, disease etiology, severity and control, and comorbidities. RESULTS In 12 868 person-years of follow-up, 334 died vs 290.6 expected (standardized mortality ratio [SMR], 1.15 [95% confidence interval (CI),1.03-1.28]; P = .01). Increased all-cause mortality largely reflected increased circulatory deaths (SMR, 1.20 [95% CI, 1.01-1.43]; P = .04). All-cause mortality was increased for the person-years accumulated during thionamide treatment (SMR, 1.30 [95% CI, 1.05-1.61]; P = .02) and after 131-I not associated with hypothyroidism (SMR, 1.24 [95% CI, 1.04-1.46]; P = .01) but not during T₄ replacement for 131-I-induced hypothyroidism (SMR, 0.98 [95% CI, 0.82-1.18]; P = .85). Within-cohort analysis comparing mortality during thionamide treatment showed a similar hazard ratio (HR) for all-cause mortality when 131-I did not result in hypothyroidism (HR, 0.95 [95% CI, 0.70-1.29]), but reduced mortality with 131-I-induced hypothyroidism (HR, 0.70 [95% CI, 0.51-0.96]). Reduced mortality associated with hypothyroidism was seen only in those without significant comorbidities and not in those with other serious diseases. Atrial fibrillation at presentation (P = .02) and an increment of 10 pmol/L in serial free T₄ concentration during follow-up (P = .009) were independently associated with mortality. CONCLUSIONS Among hyperthyroid subjects aged 40 years or older, mortality was increased during periods of thionamide treatment and after radioiodine not resulting in hypothyroidism, but not during follow-up after radioiodine-induced hypothyroidism. Independent associations of mortality with atrial fibrillation and incomplete biochemical control during treatment indicate potential causative links with poor outcome.
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Affiliation(s)
- Kristien Boelaert
- Centre for Endocrinology, Diabetes, and Metabolism, School of Clinical and Experimental Medicine, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom.
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Franklyn JA. The thyroid--too much and too little across the ages. The consequences of subclinical thyroid dysfunction. Clin Endocrinol (Oxf) 2013; 78:1-8. [PMID: 22891671 DOI: 10.1111/cen.12011] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 07/11/2012] [Accepted: 08/09/2012] [Indexed: 01/07/2023]
Abstract
Mild thyroid dysfunction is common, and more prevalent than overt hyper- and hypothyroidism. Subclinical (mild) thyroid dysfunction is a biochemical entity characterized by an abnormality of serum TSH associated with normal serum thyroid hormone concentrations. Subclinical hyperthyroidism is thus defined as low or suppressed serum TSH with normal serum-free T4 and T3, while subclinical hypothyroidism is defined as raised serum TSH with normal circulating T4. These biochemical abnormalities are part of the much wider spectrum of thyroid dysfunction which includes overt hyperthyroidism and overt hypothyroidism, but by no means always indicate underlying thyroid disease. There is much debate about the significance of mild abnormalities of thyroid function in terms of symptoms and potential associations with long-term morbidity and mortality and hence much debate about whether to screen for these abnormalities, and, once identified, whether to treat or monitor, and if so, how? Our knowledge base has increased significantly in recent years, principally because studies of large cohorts have begun to define the epidemiology and associations of mild thyroid dysfunction (including short-term and long-term outcomes) and a small but increasing number of randomized-controlled intervention studies have been reported. There is, however, much to learn about these disorders and, given their prevalence, their impact on health.
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Affiliation(s)
- Jayne A Franklyn
- School of Clinical and Experimental Medicine, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK.
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Collier A. Thyrotoxicosis and radioiodine therapy: Does the dose matter? Indian J Endocrinol Metab 2012; 16:S147-9. [PMID: 23565364 PMCID: PMC3603012 DOI: 10.4103/2230-8210.104025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
There are 3 treatment options for thyrotoxicosis: Antithyroid drugs, Surgery and radioiodine. The choice of treatment varies geographically. Radioiodine therapy is preferred in the United States. The aim of radioiodine is to destroy sufficient thyroid tissue to cure the hyperthyroidism. There is a lack of consensus towards what dose of radioiodine should be used. Several methods are used to determine the dose. In our practice we administer 400 MBq to patients with Graves and in patients with large multinodular goiter, we would administer 800 MBq.
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Affiliation(s)
- Andrew Collier
- consultant, Diabetes Day care centre University Hospital of Ayr, Scotland, United Kingdom
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Bonnema SJ, Hegedüs L. Radioiodine therapy in benign thyroid diseases: effects, side effects, and factors affecting therapeutic outcome. Endocr Rev 2012; 33:920-80. [PMID: 22961916 DOI: 10.1210/er.2012-1030] [Citation(s) in RCA: 160] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Radioiodine ((131)I) therapy of benign thyroid diseases was introduced 70 yr ago, and the patients treated since then are probably numbered in the millions. Fifty to 90% of hyperthyroid patients are cured within 1 yr after (131)I therapy. With longer follow-up, permanent hypothyroidism seems inevitable in Graves' disease, whereas this risk is much lower when treating toxic nodular goiter. The side effect causing most concern is the potential induction of ophthalmopathy in predisposed individuals. The response to (131)I therapy is to some extent related to the radiation dose. However, calculation of an exact thyroid dose is error-prone due to imprecise measurement of the (131)I biokinetics, and the importance of internal dosimetric factors, such as the thyroid follicle size, is probably underestimated. Besides these obstacles, several potential confounders interfere with the efficacy of (131)I therapy, and they may even interact mutually and counteract each other. Numerous studies have evaluated the effect of (131)I therapy, but results have been conflicting due to differences in design, sample size, patient selection, and dose calculation. It seems clear that no single factor reliably predicts the outcome from (131)I therapy. The individual radiosensitivity, still poorly defined and impossible to quantify, may be a major determinant of the outcome from (131)I therapy. Above all, the impact of (131)I therapy relies on the iodine-concentrating ability of the thyroid gland. The thyroid (131)I uptake (or retention) can be stimulated in several ways, including dietary iodine restriction and use of lithium. In particular, recombinant human thyrotropin has gained interest because this compound significantly amplifies the effect of (131)I therapy in patients with nontoxic nodular goiter.
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Affiliation(s)
- Steen Joop Bonnema
- Department of Endocrinology, Odense University Hospital, DK-5000 Odense C, Denmark.
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Martin NM, Patel M, Nijher GMK, Misra S, Murphy E, Meeran K. Adjuvant lithium improves the efficacy of radioactive iodine treatment in Graves' and toxic nodular disease. Clin Endocrinol (Oxf) 2012; 77:621-7. [PMID: 22443227 DOI: 10.1111/j.1365-2265.2012.04385.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
CONTEXT Lithium increases iodine retention in the thyroid gland and inhibits thyroid hormone release. Although lithium has been reported to improve the efficacy of radioactive iodine (RAI) treatment in Graves' disease, its role as an adjunct to RAI treatment of hyperthyroidism, particularly in toxic nodular disease, remains contentious. OBJECTIVE To assess whether adjuvant lithium increases the efficacy of a fixed dose RAI regimen in Graves' and toxic nodular hyperthyroid patients. DESIGN AND SETTING Retrospective cohort study in a tertiary referral centre. Two hundred and four hyperthyroid patients (163 Graves' disease, 26 toxic multinodular goitre and 15 solitary toxic thyroid adenoma). INTERVENTION One hundred and three patients received RAI alone (median dose 558 MBq). One hundred and one patients received RAI (median dose 571 MBq) with adjuvant lithium (800 mg/day for 10 days). MAIN OUTCOME MEASURE Proportion of patients cured at any time over a 1-year period following RAI treatment. Cure was defined as sustained (two or more sequential time points) biochemical euthyroidism or hypothyroidism during the follow-up period. RESULTS The likelihood of cure at any time was 60% greater in all hyperthyroid patients (Graves' plus toxic nodular disease) receiving adjuvant lithium (n = 204, P = 0·003). In patients with Graves' disease receiving RAI + lithium, there was a similar occurrence in cure (n = 163, P = 0·006). Cure was twice as likely in patients with toxic nodular (non-Graves') disease receiving RAI + lithium compared with RAI alone (n = 41, P = 0·01). CONCLUSIONS This study supports the use of adjuvant lithium to improve the efficacy of RAI in the treatment of Grave's disease and suggests a novel role in the management of toxic nodular (non-Graves') disease.
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Affiliation(s)
- Niamh M Martin
- Imperial Centre for Endocrinology, Imperial College Healthcare NHS Trust, UK.
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Abstract
Thyrotoxicosis is a common disorder, especially in women. The most frequent cause is Graves' disease (autoimmune hyperthyroidism). Other important causes include toxic nodular hyperthyroidism, due to the presence of one or more autonomously functioning thyroid nodules, and thyroiditis caused by inflammation, which results in release of stored hormones. Antithyroid drugs are the usual initial treatment (thionamides such as carbimazole or its active metabolite methimazole are the drugs of choice). A prolonged course leads to remission of Graves' hyperthyroidism in about a third of cases. Because of the low remission rate in Graves' disease and the inability to cure toxic nodular hyperthyroidism with antithyroid drugs alone, radioiodine is increasingly used as first line therapy, and is the preferred choice for relapsed Graves' hyperthyroidism. Total thyroidectomy is an option in selected cases. Future efforts are likely to concentrate on novel and safe ways to modulate the underlying disease process rather than stopping excess thyroid hormone production.
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Affiliation(s)
- Jayne A Franklyn
- Centre for Diabetes, Endocrinology and Metabolism, School of Clinical and Experimental Medicine, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK.
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Kahraman D, Keller C, Schneider C, Eschner W, Sudbrock F, Schmidt M, Schicha H, Dietlein M, Kobe C. Development of hypothyroidism during long-term follow-up of patients with toxic nodular goitre after radioiodine therapy. Clin Endocrinol (Oxf) 2012; 76:297-303. [PMID: 21854403 DOI: 10.1111/j.1365-2265.2011.04204.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To investigate the cure rate and incidence of hypothyroidism of radioiodine treatment with a calculated dose regimen and an intended thyroid dose of 150 Gy in patients with toxic nodular goitre during long-term follow-up. PATIENTS A total of 265 consecutive patients with toxic nodular goitre were treated between March 2003 and August 2004 at our institute and followed up for a maximum of 8 years. Preliminary radioiodine testing with volumetric measurement of the thyroid by ultrasound as well as individual thyroidal radioiodine uptake and half-life measurements were performed before radioiodine therapy. The estimated radiation dose to the thyroid was 150 Gy. MEASUREMENTS Follow-up controls with respect to success of therapy and development of hypothyroidism were performed 3 months, 1 and up to 8 years after radioiodine treatment. The relation of the achieved thyroid dose to the success rate of treatment and to the incidence of hypothyroidism was analysed. RESULTS The cure rates were 85% at 3 months, 98% at 1 year and 98% at the end of follow-up. Above an achieved thyroid dose of more than 120 Gy, there was no significant association between the dose achieved in the thyroid and the cure rate on follow-up. The incidences of hypothyroidism at 3 months, at 1 year and at the end of follow-up were 32%, 55% and 73%, respectively. CONCLUSIONS Radioiodine treatment with a calculated dose regimen is a highly effective treatment option in patients with toxic goitre with an overall success rate of 98%. However, radioiodine treatment with an intended thyroid dose of 150 Gy leads to a high incidence of hypothyroidism on long-term follow-up. This finding supports the suggestion that in future intended thyroid doses could be lowered in patients treated with a calculated dose regimen for toxic nodular goitre.
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Affiliation(s)
- Deniz Kahraman
- Department of Nuclear Medicine, University Hospital of Cologne, Cologne, Germany.
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Abstract
All forms of thyroid diseases are much more frequently observed in women than men, although the reasons are still not completely elucidated.Hyperthyroidism is defined by elevated circulating free thyroid hormones. The prevalence is about 2 % in women and 0.2 % in men. The most frequent causes are various forms of thyroid autonomy in elderly women and Graves' disease, which occurs mostly in younger women.Hypothyroidism is defined by a lack of thyroid hormones. It is a common endocrine disorder caused by autoimmune thyroiditis (Hashimoto thyroiditis), iodine deficiency or following surgery or radioiodine therapy. Thyroxine requirements depend on fat-free mass and are, therefore, somewhat higher in males who are more often undersubstituted. In pregnancy lower TSH-reference ranges have to be considered and thyroid function should be monitored throughout pregnancy to avoid harm to the foetus caused by maternal thyroid dysfunctions. If overtreated women more often feature fractures, whereas males more often develop atrial fibrillation.
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Affiliation(s)
- Alois Gessl
- Department of Internal Medicine III, Medical University Of Vienna, Vienna, Austria
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Peacey SR, Kumar S, Wright D, King R. The follow-up of radioiodine-treated hyperthyroid patients: should thyroid function be monitored more frequently? J Endocrinol Invest 2012; 35:82-6. [PMID: 21720207 DOI: 10.3275/7807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND There is a lack of data regarding the timing and particularly the severity of hypothyroidism post radioiodine (RI). AIM To investigate the timing and severity of hypothyroidism in RI-treated hyperthyroid patients. METHODS Retrospective examination of the records of 183 RI-treated hyperthyroid patients (79 autoimmune hyperthyroidism, 46 toxic multinodular goiter, and 58 hyperthyroidism of indeterminate etiology). RESULTS One hundred and fifty-nine patients requiring a single dose of RI (435 MBq), 107 (67%) developed hypothyroidism. Hypothyroidism detected in: 16% of patients at <8 weeks, 46% at 8 to <16 weeks, 24% at 16 to <24 weeks, 9% at 24 to <36 weeks, 3% at 36 to <52 weeks, and 2% at >52 weeks. One hundred and eighty-three patients had follow-up after one or more doses of RI and 124 (68%) patients developed hypothyroidism; of these, 44 (36%) had TSH>50 mU/l and 34 (27%) had free T4<5 pmol/l when hypothyroidism was first detected. Of those patients with a delayed outpatient visit (no.=77) and those with an outpatient visit within the recommended target interval (no.=47), median TSH was 23 (0.05-152) mU/l and 32 (0.05-150) mU/l, respectively (p=0.75) and median free T4 was 7.1 (1.3-16.7) pmol/l and 6.6 (1.3-15.4) pmol/l, respectively (p=0.21) at first detection of hypothyroidism. CONCLUSIONS The severity of hypothyroidism when first detected during follow-up is of concern and suggests that closer monitoring of thyroid function is required, particularly during the first 6 months post- RI therapy.
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Affiliation(s)
- S R Peacey
- Department of Diabetes and Endocrinology, Bradford Teaching Hospitals NHS Foundation Trust, Bradford, UK.
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Orgiazzi J. Traitement de la maladie de Basedow : problématiques actuelles. Presse Med 2011; 40:1155-62. [DOI: 10.1016/j.lpm.2011.09.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Revised: 09/23/2011] [Accepted: 09/27/2011] [Indexed: 11/25/2022] Open
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Gupta SK, McGrath S, Rogers K, Attia J, Lewis G, Viswanathan S, Saul M, Allen L. Fixed dose (555 MBq; 15 mCi) radioiodine for the treatment of hyperthyroidism: outcome and its predictors. Intern Med J 2010; 40:854-7. [DOI: 10.1111/j.1445-5994.2010.02348.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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