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Armstrong VL, Funkhouser A, Memeh K, Heidel E, Mancini M, Vaghaiwalla T. Thyroidectomy Outcomes in Obese Patients. J Surg Res 2024; 295:717-722. [PMID: 38142574 DOI: 10.1016/j.jss.2023.11.071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 11/16/2023] [Accepted: 11/23/2023] [Indexed: 12/26/2023]
Abstract
INTRODUCTION Obese patients often have higher complication rates after elective general surgeries; however, few studies have examined the outcomes after thyroidectomy. This study examines whether increased body mass index (BMI) is associated with poor postoperative outcomes after thyroid surgery. METHODS A retrospective review of patients who underwent thyroidectomy from 2015 to 2018 was performed. Demographics, comorbidities, pathology, and extent of resection (total versus hemithyroidectomy) were examined. Patients were classified into BMI groups according to the WHO definitions, and the incidence of surgical outcomes was determined in each group. Surgical outcomes of interest included readmission rates (RRs), length of stay, average operating room time, return to the operating room, hypocalcemia, postop infections, hematomas, and recurrent laryngeal nerve injury. Between-subjects statistics including independent samples t-test, ANOVA, and chi-square analyses were performed. RESULTS There were n = 465 patients included with a mean BMI 32.35 (standard deviation = 8.55) and median BMI 30.78 (Q1 = 26.26, Q3 = 36.73). There were no differences between BMI groups in age, gender, smoking, heart disease. There was a positive association between increased BMI and postoperative infection (P < 0.001), pneumonia (P = 0.018), and surgical site infection (P = 0.04), which were highest for BMI > 40. Increased BMI was associated with a higher 30-d RR (P = 0.008), particularly for BMI >40 versus BMI <40 (6.2% versus 1.05%; P = 0.003). There were no significant differences between surgical outcomes for patients with increased BMI who underwent total thyroidectomy or hemithyroidectomy. CONCLUSIONS Excellent postoperative outcomes were observed in all BMI categories. Higher postoperative infection and 30-d RRs were observed in the morbidly obese. Contrary to previous studies, operating room times were similar regardless of BMI.
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Affiliation(s)
| | - Alex Funkhouser
- Department of Surgery, University of Tennessee Graduate School of Medicine, Knoxville, Tennessee
| | - Kelvin Memeh
- Department of Surgery, Methodist University Hospital, Memphis, Tennessee
| | - Eric Heidel
- Department of Surgery, University of Tennessee Graduate School of Medicine, Knoxville, Tennessee
| | - Matt Mancini
- Department of Surgery, University of Tennessee Graduate School of Medicine, Knoxville, Tennessee
| | - Tanaz Vaghaiwalla
- Department of Surgery, University of Tennessee Graduate School of Medicine, Knoxville, Tennessee
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Park Y, Yu HW, Lee JK, Choi JH, Kim W, Kwak J, Kim SJ, Chai YJ, Suh H, Choi JY, Lee KE. Effect of body habitus on surgical outcomes following bilateral axillo-breast approach robotic thyroidectomy: a retrospective cohort study. Int J Surg 2023; 109:1257-1263. [PMID: 36999794 PMCID: PMC10389347 DOI: 10.1097/js9.0000000000000279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 02/10/2023] [Indexed: 04/01/2023]
Abstract
INTRODUCTION BMI has been shown to predict perioperative outcomes in patients undergoing surgery. Most studies assessing the role of body habitus in thyroid surgery have focused on open surgery, with few studies assessing patients undergoing robotic surgery. The present study evaluated the effects of BMI on surgical outcomes in patients undergoing bilateral axillo-breast approach (BABA) robotic thyroidectomy. MATERIALS AND METHODS This study included patients who underwent BABA robotic thyroidectomy between January 2013 and September 2021 at Seoul National University Bundang Hospital. Patients were categorized into six groups based on the WHO classification of overweight and obesity. Clinicopathological characteristics, postoperative complications, and surgical outcomes were evaluated. RESULTS A total of 1921 patients were included. Comparisons of the six BMI groups showed no statistically significant differences in postoperative stay, resection margin involvement, postoperative complications, and recurrence. Subgroup analysis showed that hypocalcemia rates differed among BMI groups in patients who underwent lobectomy, with underweight and class II obese patients being at the highest risk ( P =0.006). However, the actual number of complications was relatively small and similar among the groups. In patients who underwent total thyroidectomy and isthmectomy, BMI was not correlated with postoperative complications, including hypocalcemia, recurrent laryngeal nerve palsy, postoperative bleeding, and chyle leakage. CONCLUSION Body habitus was not significantly associated with operative time and postoperative complications in patients undergoing BABA robotic thyroidectomy, indicating that this approach is safe and feasible in obese patients.
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Affiliation(s)
- Yeshong Park
- Department of Surgery, Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do
| | - Hyeong Won Yu
- Department of Surgery, Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do
- Department of Surgery, Seoul National University College of Medicine
| | - Ja Kyung Lee
- Department of Surgery, Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do
| | - Jee-Hye Choi
- Department of Surgery, Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do
- Department of Surgery, Icahn School of Medicine at Mount Sinai, Mount Sinai Health System, New York, New York
| | - Woochul Kim
- Department of Surgery, Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do
| | - JungHak Kwak
- Department of Surgery, Seoul National University Hospital, Jongno-gu
| | - Su-jin Kim
- Department of Surgery, Seoul National University College of Medicine
- Department of Surgery, Seoul National University Hospital, Jongno-gu
| | - Young Jun Chai
- Department of Surgery, Seoul National University College of Medicine
- Department of Surgery, Seoul National University Boramae Medical Center, Dongjak-gu, Seoul, Korea
| | - Hyunsuk Suh
- Suh Scarless Thyroid Surgery Center, Tampa, Florida, USA
| | - June Young Choi
- Department of Surgery, Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do
- Department of Surgery, Seoul National University College of Medicine
| | - Kyu Eun Lee
- Department of Surgery, Seoul National University College of Medicine
- Department of Surgery, Seoul National University Hospital, Jongno-gu
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Mahvi DA, Witt RG, Lyu HG, Gawande AA, Nehs MA, Doherty GM, Cho NL. Increased BMI is Associated With Lower Risk of Hypocalcemia in Total Thyroidectomy Patients. J Surg Res 2022; 279:240-246. [DOI: 10.1016/j.jss.2022.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 05/01/2022] [Accepted: 06/07/2022] [Indexed: 11/29/2022]
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Prediction Model of Postoperative Severe Hypocalcemia in Patients with Secondary Hyperparathyroidism Based on Logistic Regression and XGBoost Algorithm. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:8752826. [PMID: 35924110 PMCID: PMC9343187 DOI: 10.1155/2022/8752826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 06/14/2022] [Accepted: 07/07/2022] [Indexed: 11/18/2022]
Abstract
Objective A predictive model was established based on logistic regression and XGBoost algorithm to investigate the factors related to postoperative hypocalcemia in patients with secondary hyperparathyroidism (SHPT). Methods A total of 60 SHPT patients who underwent parathyroidectomy (PTX) in our hospital were retrospectively enrolled. All patients were randomly divided into a training set (n = 42) and a test set (n = 18). The clinical data of the patients were analyzed, including gender, age, dialysis time, body mass, and several preoperative biochemical indicators. The multivariate logistic regression and XGBoost algorithm models were used to analyze the independent risk factors for severe postoperative hypocalcemia (SH). The forecasting efficiency of the two prediction models is analyzed. Results Multivariate logistic regression analysis showed that body mass (OR = 1.203, P = 0.032), age (OR = 1.214, P = 0.035), preoperative PTH (OR = 1.026, P = 0.043), preoperative Ca (OR = 1.062, P = 0.025), and preoperative ALP (OR = 1.031, P = 0.027) were positively correlated with postoperative SH. The top three important features of XGBoost algorithm prediction model were preoperative Ca, preoperative PTH, and preoperative ALP. The area under the curve of the logistic regression and XGBoost algorithm model in the test set was 0.734 (95% CI: 0.595~0.872) and 0.827 (95% CI: 0.722~0.932), respectively. Conclusion The predictive models based on the logistic regression and XGBoost algorithm model can predict the occurrence of postoperative SH.
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Transient Hypocalcemia After Total Thyroidectomy: The Obesity Paradox at Work? J Surg Res 2022; 278:93-99. [PMID: 35594620 DOI: 10.1016/j.jss.2022.04.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 04/08/2022] [Accepted: 04/08/2022] [Indexed: 11/24/2022]
Abstract
INTRODUCTION With increasing rates of obesity worldwide, a correlation between high body mass index (BMI) and postoperative morbidity after thyroid surgery remains unclear. Postoperative transient hypocalcemia is common after total thyroidectomy due to interruption of parathyroid function. This study examines the relationship between BMI and hypocalcemia after total thyroidectomy. MATERIALS AND METHODS A retrospective review of prospectively collected data for 1135 patients who underwent total thyroidectomy for cancer, multinodular goiter (MNG), or Graves' disease between June 2009 and November 2020 at a single institution was performed. BMI groups followed the World Health Organization classification. Hypocalcemia was defined as serum calcium ≤8 mg/dL. Calcium levels measured on postoperative day 0 and the following morning were compared between the BMI groups. RESULTS Of 1135 total thyroidectomy patients, 85% were women. The mean age and standard deviation of patients was 49 (± 13) y, with most of Hispanic origin (64%). Overall, 41.5% of patients had cancer, 45% nontoxic MNG, 5.8% toxic MNG, and 12% Graves' disease. Stratified by BMI, 27% of patients were normal, 34% overweight, and 39% obese. Overall, overweight and obese patients experienced less transient hypocalcemia at both time points compared to normal patients postoperatively (P = 0.01 and P = 0.009). Furthermore, overweight and obese patients with Graves' disease experienced less transient hypocalcemia at both time points (P = 0.04 and P = 0.05). There was no statistical difference in other groups. CONCLUSIONS A protective role of higher BMI or "obesity paradox" for postoperative hypocalcemia may exist in those obese patients after total thyroidectomy.
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Konishi T, Fujiogi M, Michihata N, Niwa T, Morita K, Matsui H, Fushimi K, Tanabe M, Seto Y, Yasunaga H. Impact of body mass index on short-term outcomes after differentiated thyroid cancer surgery: a nationwide inpatient database study in Japan. Eur Thyroid J 2022; 11:ETJ-21-0081. [PMID: 34981742 PMCID: PMC9142812 DOI: 10.1530/etj-21-0081] [Citation(s) in RCA: 2] [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] [Received: 09/22/2021] [Accepted: 09/30/2021] [Indexed: 12/01/2022] Open
Abstract
INTRODUCTION Recent studies have shown worse post-operative outcomes following several surgeries in underweight or obese patients. However, the association between body mass index (BMI) and short-term outcomes following thyroid cancer surgery remains unclear because of the small number of patients, deficits in background data known as risk factors (e.g. cancer stage, operative procedure, intraoperative device use and hospital volume) and categorisation of BMI. METHODS We identified patients who underwent thyroidectomy for differentiated thyroid cancer from July 2010 to March 2017 using a Japanese nationwide inpatient database. We used restricted cubic spline (RCS) analyses to investigate potential non-linear associations between BMI (without categorisation) and outcomes: post-operative complications (local and general), duration of anaesthesia, post-operative length of hospital stay and hospitalisation costs. The analyses were adjusted for demographic and clinical backgrounds including the above-stated factors. We also performed multivariable regression analyses for the outcomes with categorisation of BMI. RESULTS Among 59,671 eligible patients, the median BMI was 22.9 kg/m2 (interquartile range (IQR), 20.7-25.6 kg/m2). In total, 3860 patients (6.5%) had local complications and 787 patients (1.3%) had general complications. Although there were no significant associations with local complications, such as bleeding, recurrent laryngeal nerve paralysis and surgical site infection, the occurrence of general complications was significantly associated with higher BMI. BMI showed a linear association with the duration of anaesthesia and U-shaped associations with post-operative length of stay and hospitalisation costs. The lowest points of the U-shaped curves occurred at a BMI of approximately 24 kg/m2. The multivariate regression analyses showed consistent results with the RCS analyses. DISCUSSION/CONCLUSION Whereas RCS analyses revealed no significant associations between BMI and post-operative local complications, obesity was significantly associated with the occurrence of general complications. The linear association between BMI and duration of anaesthesia corresponds to previous studies. Although post-operative length of stay and total hospitalisation costs demonstrated U-shaped associations, the slight differences would not be clinically important. Even if surgeons must pay attention to general complications in obese patients undergoing thyroid cancer surgery as well as other surgeries, underweight and overweight patients can undergo thyroidectomy as safely as patients with normal BMI.
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Affiliation(s)
- Takaaki Konishi
- Department of Breast and Endocrine Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan
- Correspondence should be addressed to T Konishi:
| | - Michimasa Fujiogi
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan
- Department of Emergency Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Nobuaki Michihata
- Department of Health Services Research, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Takayoshi Niwa
- Department of Breast and Endocrine Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kojiro Morita
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan
- Department of Health Services, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Hiroki Matsui
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan
| | - Kiyohide Fushimi
- Department of Health Policy and Informatics, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
| | - Masahiko Tanabe
- Department of Breast and Endocrine Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yasuyuki Seto
- Department of Breast and Endocrine Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Hideo Yasunaga
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan
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Cali B, Hasani A, Buffet C, Menegaux F, Chereau N. Is there a relationship between different types of prior bariatric surgery and post-thyroidectomy hypocalcemia? Gland Surg 2021; 10:2088-2094. [PMID: 34422579 DOI: 10.21037/gs-21-225] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 06/23/2021] [Indexed: 11/06/2022]
Abstract
Background Hypocalcemia is a common complication after total thyroidectomy (TT). A history of bariatric surgery has been identified as a risk factor for this complication. This study aimed to assess the risk of hypocalcemia post TT in patients with a history of obesity procedures: laparoscopic sleeve gastrectomy (LSG), Roux-en-Y gastric bypass (RYGB), and laparoscopic gastric banding (LAGB). Methods We compared the risk of hypocalcemia post TT (serum calcium levels <8 mg/dL) between patients with restrictive (LSG and LAGB), malabsorptive (RYGB), and patients without a history of obesity surgery. Hypoparathyroidism was considered permanent if the plasma parathyroid hormone (PTH) levels at 6 months were less than 15 pg/mL (normal range: 15-65 pg/mL) and the patient still required oral calcium (calcium carbonate) and vitamin D supplementation, in addition to the supplements that were taken routinely before thyroidectomy. Results From the 13,242 patients who underwent TT from 2006 to 2018, 90 patients (0.7%) had a history of bariatric surgery: 35 LAGB, 29 LSG, and 26 RYGB. The risk of hypocalcemia was higher in RYGB patients (50%, n=13) than in LAGB (17.1%, n=6) or LSG patients (20.6%, n=6) (P=0.003). Furthermore, hypocalcemia risk was similar between patients with a history of restrictive procedures (18.8%, 12/64) and patients with no history of bariatric surgery (17.2%, 2,268/13,152) (P=0.4). Permanent hypoparathyroidism was observed in one and 6 patients from the LAGB and RYGB groups, respectively; however, it was not observed in any patient from the LSG group. Conclusions RYGB is a risk factor for hypocalcemia post TT, while restrictive bariatric procedures are not.
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Affiliation(s)
- Benedetto Cali
- Department of General and Endocrine Surgery, Pitié Salpêtrière Hospital, APHP, Sorbonne University, 47-83 Boulevard de l'Hôpital, Paris, France
| | - Ariola Hasani
- Department of General and Endocrine Surgery, Pitié Salpêtrière Hospital, APHP, Sorbonne University, 47-83 Boulevard de l'Hôpital, Paris, France
| | - Camille Buffet
- Thyroid and Endocrine Tumor Unit, Pitié Salpêtrière Hospital, APHP, Sorbonne University, 47-83 Boulevard de l'Hôpital, Paris, France.,Groupe de Recherche Clinique n°16 Thyroid Tumors, Sorbonne University, Paris, France
| | - Fabrice Menegaux
- Department of General and Endocrine Surgery, Pitié Salpêtrière Hospital, APHP, Sorbonne University, 47-83 Boulevard de l'Hôpital, Paris, France.,Groupe de Recherche Clinique n°16 Thyroid Tumors, Sorbonne University, Paris, France
| | - Nathalie Chereau
- Department of General and Endocrine Surgery, Pitié Salpêtrière Hospital, APHP, Sorbonne University, 47-83 Boulevard de l'Hôpital, Paris, France.,Groupe de Recherche Clinique n°16 Thyroid Tumors, Sorbonne University, Paris, France
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Partial Versus Total Thyroidectomy: What Influences Most Surgeons' Decision? Analysis of a Nationwide Cohort of 375,810 Patients Over 10 Years. Ann Surg 2021; 274:829-835. [PMID: 34353991 DOI: 10.1097/sla.0000000000005134] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
National and international guidelines about thyroid surgery seem to be moving more and more towards less radical surgical procedures but everyday practice does not seem to always align with them. We describe for the first time the role of non-surgical parameters in the surgeon's choice for thyroid surgery. OBJECTIVE To describe thyroid surgery and to identify the factors leading to either a total or a partial thyroidectomy regardless of the severity of the thyroid disease. SUMMARY BACKGROUND DATA National and international guidelines about thyroid surgery seem to be moving more and more towards less radical surgical procedures but everyday practice does not seem to always align with them. METHODS We based this nationwide retrospective cohort study on a national database that compiles discharge abstracts for every admission for thyroidectomy to French acute healthcare facilities (PMSI database 2010 to 2019). RESULTS In this study, 375,810 patients (male: 23%; age = 53 ± 15 y) had a thyroidectomy (partial: 28%) for cancer (17%), hyperthyroidism (16%), non-functioning goiter (64%) or other (3%). We noticed a global trend toward more partial thyroidectomy (p < 0.001) with a significant increase in the proportion of lobectomy in the post-ATA recommendations' period (p < 0.001) as well as in the "French Levothyrox crisis" period, in which we saw an unexpected rise of adverse events notifications associated with the marketing of a new formula of Levothyrox (p < 0.001) amid widespread media coverage. In a multivariate analysis, we also identified that complete resection was more frequently performed in centers with a caseload > 40/y (p < 0.001, OR = 1.48), for obese patients (BMI> 30 kg/m2; p < 0.001, OR = 1.42), and according to the indication of surgery (OR benign = 1, OR cancer = 2.25, OR hyperthyroidism = 4.13). CONCLUSION We describe for the first time the role of non-surgical parameters in the surgeon's choice for thyroid surgery.
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Association of BMI with Clinicopathological Features of Papillary Thyroid Cancer: A Systematic Review and Meta-Analysis. World J Surg 2021; 45:2805-2815. [PMID: 34136926 DOI: 10.1007/s00268-021-06193-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/09/2021] [Indexed: 01/08/2023]
Abstract
BACKGROUND Papillary thyroid cancer (PTC) is the most common subtype of thyroid cancer. The incidence of PTC is rising in tandem with an obesity epidemic. Associations have been demonstrated between increased body mass index (BMI) and worse oncological outcomes in a number of malignancies. However, research on this topic in PTC to date has been inconsistent, often due to limited data. This study aimed to measure the association between BMI and potentially adverse clinicopathological features of PTC. METHODS A meta-analysis of studies reporting outcomes after surgical treatment of PTC was performed. PubMed, Embase and the Cochrane Library were searched systematically to identify studies which provided data on BMI and clinicopathologic features of PTC. Relevant data were extracted and synthesis performed using adjusted odds ratios where available and crude values when not. Data were analysed by inverse variance using random and fixed effects models. RESULTS Data on 35,237 patients from 15 studies met the criteria for inclusion. Obesity was associated with larger tumour size (MD = 0.17 cm [0.05, 0.29]), increased rates of multifocality (OR = 1.41 [1.16, 1.70]), extrathyroidal extension (OR = 1.70 [1.39, 2.07]) and nodal spread (OR = 1.18 [1.07, 1.30]). Associations were more pronounced as BMI increased. There was no association between BMI and bilaterality, vascular invasion or metastatic spread. CONCLUSION Increased BMI is significantly associated with multiple potentially adverse features of PTC. The effect on long-term oncological outcomes requires further evaluation.
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Canu GL, Medas F, Cappellacci F, Podda MG, Romano G, Erdas E, Calò PG. Can thyroidectomy be considered safe in obese patients? A retrospective cohort study. BMC Surg 2020; 20:275. [PMID: 33160350 PMCID: PMC7648980 DOI: 10.1186/s12893-020-00939-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 10/29/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Obesity is a growing public health concern in most western countries. More and more patients with high body mass index (BMI) are undergoing surgical procedures of all kinds and, in this context, obese patients are undergoing thyroid surgery more than ever before. The aim of the present study was to evaluate whether thyroidectomy can be considered safe in obese patients. METHODS Patients undergoing thyroidectomy in our Unit between January 2014 and December 2018 were retrospectively analysed. Patients were divided into two groups: those with BMI < 30 kg/m2 were included in Group A, while those with BMI ≥ 30 kg/m2 in Group B. Univariate analysis was performed to compare these two groups. Moreover, multivariate analyses were performed to evaluate whether the BMI value (considered in this case as a continuous variable) had a significant role in the development of each individual postoperative complication. RESULTS A total of 813 patients were included in this study: 31 (3.81%) were underweight, 361 (44.40%) normal-weight, 286 (35.18%) overweight, 94 (11.57%) obese and 41 (5.04%) morbidly obese. Six hundred and seventy-eight patients were included in Group A and 135 in Group B. At univariate analysis, the comparison between the two groups, in terms of operative time and thyroid weight resulted in statistically significant results (P = 0.001, P = 0.008; respectively). These features were significantly higher in Group B than in Group A. About postoperative stay and complications, no statistically significant difference was found between the two groups. At multivariate analyses, only the development of cervical haematoma was statistically significantly correlated to the BMI value. Patients with high BMI had a lower risk of cervical haematoma (P = 0.045, OR 0.797, 95% CI 0.638-0.995). CONCLUSIONS This study showed that obesity, in the field of thyroid surgery, is not associated with any increase of postoperative complications. Thus, it is possible to conclude that thyroidectomy can be performed safely in obese patients. Our result about operative times had no clinical significance.
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Affiliation(s)
- Gian Luigi Canu
- Department of Surgical Sciences, University of Cagliari, "Policlinico Universitario Duilio Casula", 09042, Monserrato, CA, Italy.
| | - Fabio Medas
- Department of Surgical Sciences, University of Cagliari, "Policlinico Universitario Duilio Casula", 09042, Monserrato, CA, Italy
| | - Federico Cappellacci
- Department of Surgical Sciences, University of Cagliari, "Policlinico Universitario Duilio Casula", 09042, Monserrato, CA, Italy
| | - Michele Guido Podda
- Department of Surgical Sciences, University of Cagliari, "Policlinico Universitario Duilio Casula", 09042, Monserrato, CA, Italy
| | - Giorgio Romano
- Department of Surgical, Oncological and Oral Sciences, Section of General and Urgent Surgery, University of Palermo, 90127, Palermo, Italy
| | - Enrico Erdas
- Department of Surgical Sciences, University of Cagliari, "Policlinico Universitario Duilio Casula", 09042, Monserrato, CA, Italy
| | - Pietro Giorgio Calò
- Department of Surgical Sciences, University of Cagliari, "Policlinico Universitario Duilio Casula", 09042, Monserrato, CA, Italy
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Kim SY, Kim GJ, Lee DH, Bae JS, Lee SH, Kim JS, Hwang YS, Shim MR, Park YH, Sun DI. Voice change after thyroidectomy without vocal cord paralysis: Analysis of 2,297 thyroidectomy patients. Surgery 2020; 168:1086-1094. [PMID: 32919781 DOI: 10.1016/j.surg.2020.07.055] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 07/16/2020] [Accepted: 07/28/2020] [Indexed: 12/20/2022]
Abstract
BACKGROUND Some patients experience long-term voice change after thyroidectomy. One of the most common symptoms of voice change is pitch lowering, which is closely related to unfavorable voice quality. Here we observed voice outcomes for 6 months of follow-up after thyroidectomy to identify factors closely related to low-pitched voice. METHODS We retrospectively reviewed the records of 2,297 patients who underwent thyroidectomy between January 2014 and December 2017. All the patients had their vocal status examined using videostroboscopy, acoustic voice analyses, aerodynamic study, and Thyroidectomy-Related Voice Questionnaire scores. We stratified patients into 2 groups (low-pitched voice versus favorable voice) according to pitch lowering (reduction in speaking fundamental frequency ≥12 Hz 1 month after thyroidectomy compared to the preoperative value). We compared preoperative data with postoperative data collected 1, 3, and 6 months after thyroidectomy to identify factors contributing to low-pitched voice. RESULTS Univariate logistic regression analyses showed that factors related to low-pitched voice were female sex, older age, low body weight, short stature, and a high positive lymph node ratio. Multivariate analyses showed that female sex and older age were significantly associated with a negative prognosis for low-pitched voice 1 month after thyroidectomy (odds ratios 0.41 and 1.04, respectively; P < .001). Receiver operating characteristic curves for predicting sustained low-pitched voice during 6 months showed that speaking fundamental frequency ≥12.48 Hz 1 month after thyroidectomy was the optimal cutoff value, with 87.9% sensitivity and 95.8% specificity (P < .001). CONCLUSION Female sex and older age are strongly associated with increased risk for low-pitched voice after thyroidectomy. Speaking fundamental frequency ≥12.48 Hz 1 month after thyroidectomy can be used to predict sustained low-pitched voice after thyroidectomy.
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Affiliation(s)
- Sang-Yeon Kim
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Inje University of Korea, Busan, Republic of Korea
| | - Geun-Jeon Kim
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Dong-Hyun Lee
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Ja-Seong Bae
- Department of Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - So-Hee Lee
- Department of Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jeong-Soo Kim
- Department of Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Yeon-Shin Hwang
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Mi-Ran Shim
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Young-Hak Park
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Dong-Il Sun
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
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Frey S, Blanchard C, Caillard C, Drui D, Hamy A, Trésallet C, Mirallié É. Thyroid surgery in obese patients: A review of the literature. J Visc Surg 2020; 157:401-409. [PMID: 32591245 DOI: 10.1016/j.jviscsurg.2020.06.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The incidence of obesity in the general population has tripled in the past four decades. The number of bariatric surgeries performed annually has quadrupled in the past ten years due to this obesity epidemic. Concomitantly, the number of patients who are obese or who have undergone bariatric surgery and have become candidates for thyroid surgery has also increased considerably. Among patients undergoing thyroidectomy in the French population, the proportion of obese patients currently represents 10 to 20%. In addition, the frequency of benign and malignant thyroid pathologies seems to be increased by obesity, with a Hazard Ratio of around 1.8 for thyroid cancers in obese women. While obesity does not seem to influence the specific post-operative morbidity of thyroidectomy, a history of malabsorptive bariatric surgery should encourage the greatest caution in patients who need to undergo thyroid surgery since it is associated with a significant risk of severe hypocalcemia (>60% in some studies) requiring intravenous calcium supplementation in about 20% of cases. In the latter situation, peri-operative vitamin D-calcium supplementation is essential. In addition, the replacement dose of Levothyroxine (T4) intended for replacement must also be adapted in obese patients, calculated not from the actual weight but from the ideal weight. The objective of this review is to discuss the influence of obesity on the evolution of nodular and neoplastic thyroid pathologies, on the morbidity of thyroid surgery as well as on post-operative drug treatments. The impact of bariatric surgery on these different aspects is also discussed.
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Affiliation(s)
- S Frey
- Chirurgie Cancérologique, Digestive et Endocrinienne, Institut des maladies de l'Appareil Digestif, Hôtel Dieu, CHU Nantes, Place Alexis Ricordeau, 44093 Nantes cedex 1, France; University of Nantes, quai de Tourville, 44000 Nantes, France
| | - C Blanchard
- Chirurgie Cancérologique, Digestive et Endocrinienne, Institut des maladies de l'Appareil Digestif, Hôtel Dieu, CHU Nantes, Place Alexis Ricordeau, 44093 Nantes cedex 1, France; University of Nantes, quai de Tourville, 44000 Nantes, France; L'institut du thorax, inserm, CNRS, UNIV Nantes, Nantes, France
| | - C Caillard
- Chirurgie Cancérologique, Digestive et Endocrinienne, Institut des maladies de l'Appareil Digestif, Hôtel Dieu, CHU Nantes, Place Alexis Ricordeau, 44093 Nantes cedex 1, France
| | - D Drui
- L'institut du thorax, inserm, CNRS, UNIV Nantes, Nantes, France; Endocrinologie, Maladies Métaboliques et Nutrition, CHU de Nantes, Hôpital Laënnec, Boulevard Jacques Monod, 44800 Saint-Herblain, France
| | - A Hamy
- Chirurgie Digestive et Endocrinienne, CHU d'Angers, 49933 Angers cedex 09, France
| | - C Trésallet
- Service de Chirurgie Digestive, Bariatrique et Endocrinienne. Hôpitaux Universitaires Paris Seine-Saint-Denis. Avicenne Hospital, 125, rue de Stalingrad, 93000 Bobigny, France
| | - É Mirallié
- Chirurgie Cancérologique, Digestive et Endocrinienne, Institut des maladies de l'Appareil Digestif, Hôtel Dieu, CHU Nantes, Place Alexis Ricordeau, 44093 Nantes cedex 1, France; University of Nantes, quai de Tourville, 44000 Nantes, France.
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Predictors of post-thyroidectomy hypocalcaemia: a systematic and narrative review. The Journal of Laryngology & Otology 2020; 134:541-552. [PMID: 32519635 DOI: 10.1017/s0022215120001024] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Hypocalcaemia is the most common complication after total or completion thyroidectomy. This study assesses recent evidence on predictive factors for post-thyroidectomy hypocalcaemia in order to identify the patients affected and aid prevention. METHOD Two authors independently assessed articles and extracted data to provide a narrative synthesis. This study was an updated systematic search and narrative review regarding predictors of post-thyroidectomy hypocalcaemia using the Ovid Medline, Embase, Cochrane and Cinahl databases. Results were limited to papers published from January 2012 to August 2019. RESULTS Sixty-three observational studies with a total of 210 401 patients met the inclusion criteria. The median incidence was 27.5 per cent for transient biochemical hypocalcaemia, 12.5 per cent for symptomatic hypocalcaemia and 2.2 per cent for permanent hypocalcaemia. The most frequent statistically significant predictor of hypocalcaemia was peri-operative parathyroid hormone level. Symptomatic hypocalcaemia and permanent hypocalcaemia were seen more frequently in patients undergoing concomitant neck dissection. CONCLUSION Many factors have been studied for their link to post-thyroidectomy hypocalcaemia, and this study assesses the recent evidence presented in each case.
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What is the impact of continuous neuromonitoring on the incidence of injury to the recurrent laryngeal nerve during total thyroidectomy? Surgery 2020; 169:63-69. [PMID: 32409167 DOI: 10.1016/j.surg.2020.03.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/17/2020] [Accepted: 03/24/2020] [Indexed: 11/20/2022]
Abstract
BACKGROUND Continuous intraoperative neuromonitoring may facilitate reversal of intraoperative injurious operative maneuvers in comparison with intermittent intraoperative neuromonitoring. The aim of this study was to evaluate the impact of the routine use of continuous intraoperative neuromonitoring on intraoperative injuries to the recurrent laryngeal nerve. METHOD This study was a prospective case series with retrospective analysis of consecutive patients undergoing total thyroidectomy from August 2013 to August 2019. During this period, intermittent intraoperative neuromonitoring (before Mar 2016) and continuous intraoperative neuromonitoring (after Mar 2016) were used in all patients. RESULTS We reviewed the outcomes of 603 patients (466 female patients) comprising 236 who underwent intermittent intraoperative neuromonitoring and 367 who underwent continuous intraoperative neuromonitoring. Intraoperative adverse electromyography events (>50% decrease in amplitude between VN1 and VN2) were observed in 87 patients (14.5%) and were less frequent in the continuous intraoperative neuromonitoring group (10.6 vs 20.3%, P = .001). Intraoperative loss of signal (electromyography events with VN2 ≤100μV) were observed in 35 patients (5.8%) without any difference between the 2 groups of patients (5.2 vs 6.8%, P = .415). Postoperative recurrent laryngeal nerve palsies were observed in 36 patients (5.9%) without any difference between the 2 groups of patients (4.9 vs 7.6%, P = .168). CONCLUSION The routine use of continuous intraoperative neuromonitoring improves the rate of intraoperative adverse electromyography events but does not impact significantly the rates of loss of signal and recurrent laryngeal nerve palsy.
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