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Lahiri R, Rawat SS, Srikant K, Rao S. Intrathoracic Ewing's sarcoma in an adult masquerading as lung abscess. BMJ Case Rep 2024; 17:e256631. [PMID: 38296504 PMCID: PMC10831453 DOI: 10.1136/bcr-2023-256631] [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] [Indexed: 02/05/2024] Open
Abstract
Intrathoracic extraskeletal Ewing's sarcoma (EES) is a relatively uncommon malignant tumour. Here, we present a scenario involving an adult man in his 20s with a large intrathoracic EES that manifested as a lung abscess. Preoperative diagnostic tests were inconclusive; hence, the patient underwent an exploratory thoracotomy for the excision of the mass. Histopathology revealed a small round blue cell tumour, and immunohistochemistry, along with fluorescence in situ hybridisation, confirmed the diagnosis of Ewing's sarcoma. Adjuvant chemoradiotherapy was recommended, but the patient did not comply. A year later, he presented with a recurrence of the intrathoracic mass and subsequently received adjuvant chemotherapy. Currently, he is in remission.
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Affiliation(s)
- Raja Lahiri
- CVTS, All India Institute of Medical Sciences Rishikesh, Rishikesh, Uttarakhand, India
| | - Shubham Singh Rawat
- CVTS, All India Institute of Medical Sciences Rishikesh, Rishikesh, Uttarakhand, India
| | | | - Shalinee Rao
- Pathology and Lab Medicine, All India Institute of Medical Sciences Rishikesh, Rishikesh, Uttarakhand, India
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Rathore K, Newman M. Management of ground-glass opacities and sub-solid pulmonary nodules: a surgeon's perspective. Indian J Thorac Cardiovasc Surg 2023; 39:160-164. [PMID: 36785599 PMCID: PMC9918649 DOI: 10.1007/s12055-022-01455-7] [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: 05/01/2022] [Revised: 11/25/2022] [Accepted: 12/01/2022] [Indexed: 02/05/2023] Open
Abstract
The regular use of high-resolution computed tomogram scans has led to an increase in the detection of asymptomatic ground-glass opacities and sub-solid nodules at an early stage. Different growth patterns of these lesions are making decision-making a real challenge. With growing experience and improving radiology interventions, management of these lesions is changing constantly. However, with variations in growth patterns and outcomes, immediate treatment options as well as follow-up surveillance and subsequent interventions can be confounding for the clinicians. This mini review describes algorithms for managing these ground-glass opacities (GGOs) and sub-solid nodules (SSNs) with a focus on the surgical options.
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Affiliation(s)
- Kaushalendra Rathore
- Department of Cardiothoracic Surgery, Sir Charles Gairdner Hospital, , Nedlands, WA 6009 Australia
| | - Mark Newman
- Department of Cardiothoracic Surgery, Sir Charles Gairdner Hospital, , Nedlands, WA 6009 Australia
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Miotto A, Perfeito JAJ, Pacheco RL, Latorraca CDOC, Riera R. Minimally invasive interventions for biopsy of malignancy-suspected pulmonary nodules: a systematic review and meta-analysis. SAO PAULO MED J 2023; 141:e2022543. [PMID: 37075381 PMCID: PMC10109545 DOI: 10.1590/1516-3180.2022.0543.r1.01022023] [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] [Received: 09/14/2022] [Accepted: 02/01/2023] [Indexed: 04/21/2023] Open
Abstract
BACKGROUND Imaging tests are important for diagnosis during the management of pulmonary nodules; however, biopsy is required to confirm the malignancy. OBJECTIVES To compare the effects of different techniques used for the biopsy of a pulmonary nodule. DESIGN AND SETTING Systematic review and meta-analysis were conducted using Cochrane methodology in São Paulo, São Paulo, Brazil. METHODS We conducted a systematic review of randomized controlled trials (RCTs) on minimally invasive techniques, including tomography-guided percutaneous biopsy (PERCUT), transbronchial biopsies with fluoroscopy (FLUOR), endobronchial ultrasound (EBUSR), and electromagnetic navigation (NAVIG). The primary outcomes were diagnostic yield, major adverse events, and need for another approach. RESULTS Seven RCTs were included (913 participants; 39.2% female, mean age: 59.28 years). Little to no increase was observed in PERCUT over FLUOR (P = 0.84), PERCUT over EBUSR (P = 0.32), and EBUSR over NAVIG (P = 0.17), whereas a slight increase was observed in NAVIG over FLUOR (P = 0.17); however, the evidence was uncertain. EBUSR may increase the diagnostic yield over FLUOR (P = 0.34). PERCUT showed little to no increase in all bronchoscopic techniques, with uncertain evidence (P = 0.02). CONCLUSION No biopsy method is definitively superior to others. The preferred approach must consider availability, accessibility, and cost, as safety and diagnostic yield do not differ. Further RCTs planned, conducted, and reported with methodological rigor and transparency are needed, and additional studies should assess cost and the correlation between nodule size and location, as well as their association with biopsy results. SYSTEMATIC REVIEW REGISTRATION PROSPERO database, CRD42018092367 -https://www.crd.york.ac.uk/PROSPERO/display_record.php?RecordID=92367.
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Affiliation(s)
- André Miotto
- IMD, PhD. Thoracic Surgeon, Assistant Professor, Thoracic Surgery Division, Universidade Federal de São Paulo (UNIFESP), São Paulo (SP), Brazil
| | - João Aléssio Juliano Perfeito
- MD, PhD. Thoracic Surgeon, Associate Professor, Thoracic Surgery Division, Universidade Federal de São Paulo (UNIFESP), São Paulo (SP), Brazil
| | - Rafael Leite Pacheco
- MD, PhD. Physician, Professor, Centro Universitário São Camilo, São Paulo (SP), Brazil; Researcher, Center of Health Technology Assessment, Hospital Sírio-Libanês São Paulo (SP), Brazil; Researcher, DCenter of Health Technology Assessment, Associação Paulista para o Desenvolvimento da Medicina (SPDM), São Paulo (SP), Brazil
| | - Carolina de Oliveira Cruz Latorraca
- PhD. Psychologist, Researcher, Center of Health Technology Assessment, Associação Paulista para o Desenvolvimento da Medicina (SPDM), São Paulo (SP), Brazil
| | - Rachel Riera
- MD, PhD. Physician, Adjunct Professor, Discipline of Evidence-Based Medicine, Universidade Federal de São Paulo (UNIFESP), São Paulo (SP), Brazil; Coordinator, Center of Health Technology Assessment, Hospital Sírio-Libanês São Paulo (SP), Brazil
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Duan L, Shan W, Bo G, Lu G, Guo L. Qualitative (and Quantitative) Values of the Lung-RADS and Computed Tomography in Diagnosing Solitary Pulmonary Nodules. Diagnostics (Basel) 2022; 12:diagnostics12112699. [PMID: 36359542 PMCID: PMC9689942 DOI: 10.3390/diagnostics12112699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 10/30/2022] [Accepted: 10/31/2022] [Indexed: 11/09/2022] Open
Abstract
Background: Lung-RADS classification and CT signs can both help in the differential diagnosis of SPNs. The purpose of this study was to investigate the diagnostic value of these two methods and the combination of the two methods for solitary pulmonary nodules (SPNs). Methods: A total of 296 cases of SPNs were retrospectively analyzed. All the SPNs were classified according to the Lung-RADS grading version 1.1. The scores of each lesion were calculated according to their CT signs. Imaging features, such as the size and margin of the lesions, pleural traction, spiculation, lobulation, bronchial cutoff, air bronchogram, vacuoles, tumor vasculature, and cavity signs, were analyzed. The imaging results were compared with the pathology examination findings. Receiver operating characteristic (ROC) curves were applied to compare the values of the different methods in differentially diagnosing benign and malignant SPNs. Results: The sensitivity, specificity, and accuracy of Lung-RADS grading for diagnosing SPNs were 34.0%, 94.4%, and 47.6%, respectively. The area under the ROC curve (AUC) was 0.600 (p < 0.001). The sensitivity, specificity, and accuracy of the CT sign scores were 56.3%, 70.0%, and 60.5%, respectively, and the AUC was 0.657 (p < 0.001). The sensitivity, specificity, and accuracy of the combination of the two methods for diagnosing SPNs were 93.2%, 61.1%, and 83.5%, and the AUC was 0.777 (p < 0.001). Conclusion: The combination of Lung-RADS classification and CT signs significantly improved the differential diagnosis of SPNs.
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Affiliation(s)
- Lizhen Duan
- Department of Medical Imaging, The Affiliated Huai’an No.1 People’s Hospital of Nanjing Medical University, Huai’an 223300, China
| | - Wenli Shan
- Department of Medical Imaging, The Affiliated Huai’an No.1 People’s Hospital of Nanjing Medical University, Huai’an 223300, China
| | - Genji Bo
- Department of Medical Imaging, The Affiliated Huai’an No.1 People’s Hospital of Nanjing Medical University, Huai’an 223300, China
| | - Guangming Lu
- Department of Medical Imaging, The Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, China
| | - Lili Guo
- Department of Medical Imaging, The Affiliated Huai’an No.1 People’s Hospital of Nanjing Medical University, Huai’an 223300, China
- Correspondence: ; Tel.: +86-13651549848
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Susam S, Çinkooğlu A, Ceylan KC, Gürsoy S, Kömürcüoğlu BE, Mertoğlu A, Çırak AK, Gayaf M, Güldaval F, Tuksavul F, Polat G, Ataman S, Yıldırım E, Koparal H, Yücel N. Comparison of Brock University, Mayo Clinic and Herder models for pretest probability of cancer in solid pulmonary nodules. THE CLINICAL RESPIRATORY JOURNAL 2022; 16:740-749. [DOI: 10.1111/crj.13546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 09/12/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Seher Susam
- Department of Radiology, Dr. Suat Seren Chest Disease and Thoracic Surgery Training and Research Hospital Health Sciences University Izmir Turkey
| | - Akın Çinkooğlu
- Department of Radiology, Dr. Suat Seren Chest Disease and Thoracic Surgery Training and Research Hospital Health Sciences University Izmir Turkey
| | - Kenan Can Ceylan
- Department of Thoracic Surgery, Dr. Suat Seren Chest Disease and Thoracic Surgery Training and Research Hospital Health Sciences University Izmir Turkey
| | - Soner Gürsoy
- Department of Thoracic Surgery, Dr. Suat Seren Chest Disease and Thoracic Surgery Training and Research Hospital Health Sciences University Izmir Turkey
| | - Berna Eren Kömürcüoğlu
- Department of Chest Disease, Dr. Suat Seren Chest Disease and Thoracic Surgery Training and Research Hospital Health Sciences University Izmir Turkey
| | - Aydan Mertoğlu
- Department of Chest Disease, Dr. Suat Seren Chest Disease and Thoracic Surgery Training and Research Hospital Health Sciences University Izmir Turkey
| | - Ali Kadri Çırak
- Department of Chest Disease, Dr. Suat Seren Chest Disease and Thoracic Surgery Training and Research Hospital Health Sciences University Izmir Turkey
| | - Mine Gayaf
- Department of Chest Disease, Dr. Suat Seren Chest Disease and Thoracic Surgery Training and Research Hospital Health Sciences University Izmir Turkey
| | - Filiz Güldaval
- Department of Chest Disease, Dr. Suat Seren Chest Disease and Thoracic Surgery Training and Research Hospital Health Sciences University Izmir Turkey
| | - Fevziye Tuksavul
- Department of Chest Disease, Dr. Suat Seren Chest Disease and Thoracic Surgery Training and Research Hospital Health Sciences University Izmir Turkey
| | - Gülru Polat
- Department of Chest Disease, Dr. Suat Seren Chest Disease and Thoracic Surgery Training and Research Hospital Health Sciences University Izmir Turkey
| | - Sena Ataman
- Department of Chest Disease, Dr. Suat Seren Chest Disease and Thoracic Surgery Training and Research Hospital Health Sciences University Izmir Turkey
| | - Eylem Yıldırım
- Department of Chest Disease, Dr. Suat Seren Chest Disease and Thoracic Surgery Training and Research Hospital Health Sciences University Izmir Turkey
| | - Hakan Koparal
- Department of Nuclear Medicine, Dr. Suat Seren Chest Disease and Thoracic Surgery Training and Research Hospital Health Sciences University Izmir Turkey
| | - Nur Yücel
- Department of Pathology, Dr. Suat Seren Chest Disease and Thoracic Surgery Training and Research Hospital Health Sciences University Izmir Turkey
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Pinto E, Penha D, Hochhegger B, Monaghan C, Marchiori E, Taborda-Barata L, Irion K. Incidental chest findings on coronary CT angiography: a pictorial essay and management proposal. JORNAL BRASILEIRO DE PNEUMOLOGIA : PUBLICACAO OFICIAL DA SOCIEDADE BRASILEIRA DE PNEUMOLOGIA E TISILOGIA 2022; 48:e20220015. [PMID: 35584528 PMCID: PMC9064655 DOI: 10.36416/1806-3756/e20220015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 03/07/2022] [Indexed: 11/17/2022]
Abstract
Many health systems have been using coronary CT angiography (CCTA) as a first-line examination for ischaemic heart disease patients in various countries. The rising number of CCTA examinations has led to a significant increase in the number of reported incidental extracardiac findings, mainly in the chest. Pulmonary nodules are the most common incidental findings on CCTA scans, as there is a substantial overlap of risk factors between the population seeking to exclude ischaemic heart disease and those at risk of developing lung cancer (i.e., advanced age and smoking habits). However, most incidental findings are clinically insignificant and actively pursuing them could be cost-prohibitive and submit the patient to unnecessary and potentially harmful examinations. Furthermore, there is little consensus regarding when to report or actively exclude these findings and how to manage them, that is, when to trigger an alert or to immediately refer the patient to a pulmonologist, a thoracic surgeon or a multidisciplinary team. This pictorial essay discusses the current literature on this topic and is illustrated with a review of CCTA scans. We also propose a checklist organised by organ and system, recommending actions to raise awareness of pulmonologists, thoracic surgeons, cardiologists and radiologists regarding the most significant and actionable incidental findings on CCTA scans.
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Affiliation(s)
- Erique Pinto
- . Faculdade de Ciências da Saúde, Universidade da Beira Interior, Covilhã, Portugal
| | - Diana Penha
- . Faculdade de Ciências da Saúde, Universidade da Beira Interior, Covilhã, Portugal.,. Imaging Department, Liverpool Heart and Chest Hospital NHS Foundation Trust, Liverpool, United Kingdom
| | - Bruno Hochhegger
- . Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre (RS) Brasil
| | - Colin Monaghan
- . Imaging Department, Liverpool Heart and Chest Hospital NHS Foundation Trust, Liverpool, United Kingdom
| | - Edson Marchiori
- . Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro (RJ) Brasil.,. Faculdade de Medicina, Universidade Federal Fluminense, Niterói (RJ) Brasil
| | - Luís Taborda-Barata
- . Faculdade de Ciências da Saúde, Universidade da Beira Interior, Covilhã, Portugal
| | - Klaus Irion
- . Imaging Department, Liverpool Heart and Chest Hospital NHS Foundation Trust, Liverpool, United Kingdom
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Xiong W, Ding W, Xu M, Pudasaini B, Sun J, Zhao Y. The screening role of a biomarker panel in BALF among patients with cancer-suspected pulmonary nodules less than 8 mm. CLINICAL RESPIRATORY JOURNAL 2020; 14:829-838. [PMID: 32502326 DOI: 10.1111/crj.13215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 05/12/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND It is intractable to differentiate the malignancy from benignancy of cancer-suspected pulmonary nodules less than 8 mm. METHODS The patients with small pulmonary nodules less than 8 mm which were suspected to be primary lung cancer underwent bronchoscopy and bronchoalveolar lavage. The level of vascular endothelial growth factor (VEGF), transforming growth factor-beta (TGF-β) and hepatocyte growth factor (HGF) in bronchoalveolar lavage fluid (BALF) were assayed. Then, all patients underwent histopathological examination by means of surgical resection of nodules to determine their benignancy or malignancy. The nodules' benignancy and malignancy suggested by the biomarker panel consisted of VEGF, TGF-β and HGF in BALF were validated by the histopathological results to determine their screening efficiency. RESULTS Among 405 patients with pulmonary nodules less than 8 mm, 252 and 153 were predicted to be malignant and benignant, respectively, by using the biomarker panel in BALF. Finally, 180 (71.4%) of 252 and 114 (74.5%) of 153 were validated to be truly malignant and benignant, respectively, according to the histopathological results. In a receiver operating characteristic curve analysis of screening efficiency for pulmonary nodules less than 8 mm, the results demonstrated that the AUC [0.807 (0.658-0.882)] of the biomarker panel in BALF was higher compared with that [0.605 (0.433-0.738)] of the biomarker panel in blood (P = .001). CONCLUSIONS For patients with cancer-suspected pulmonary nodules less 8 mm, a biomarker panel of VEGF, TGF-β and HGF in BALF demonstrated more eligible screening efficiency for the preliminary differentiation of malignancy from benignancy, by contrast with their level in blood as well as PET/CT.
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Affiliation(s)
- Wei Xiong
- Department of Respiratory Medicine, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Wei Ding
- Department of Pulmonary and Critical Care Medicine, Punan Hospital, Shanghai, China
| | - Mei Xu
- Department of Pediatrics, Community Health Service Center of North Bund, Shanghai, China
| | - Bigyan Pudasaini
- Department of Internal Medicine, Columbia Bainuo Clinic, Shanghai, China
| | - Jinyuan Sun
- Department of Respiratory Medicine, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yunfeng Zhao
- Department of Pulmonary and Critical Care Medicine, Punan Hospital, Shanghai, China
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Mourato FA, Brito AET, Romão MSC, Santos RGG, de Almeida CA, de Almeida Filho PJ, Leal ALG. Use of PET/CT to aid clinical decision-making in cases of solitary pulmonary nodule: a probabilistic approach. Radiol Bras 2020; 53:1-6. [PMID: 32313329 PMCID: PMC7159041 DOI: 10.1590/0100-3984.2019.0034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Objective To determine the frequency with which 18F-FDG-PET/CT findings change the probability of malignancy classification of solitary pulmonary nodules. Materials and Methods This was a retrospective analysis of all 18F-FDG-PET/CT examinations performed for the investigation of a solitary pulmonary nodule between May 2016 and May 2017. We reviewed medical records and PET/CT images to collect the data necessary to calculate the pre-test probability of malignancy using the Swensen model and the Herder model. The probability of malignancy was classified as low if < 5%, intermediate if 5-65%, and high if > 65%. Cases classified as intermediate in the Swensen model were reclassified by the Herder model. Results We reviewed the records for 33 patients, of whom 17 (51.5%) were male. The mean age was 68.63 ± 12.20 years. According to the Swensen model, the probability of malignancy was intermediate in 23 cases (69.7%). Among those, the application of the Herder model resulted in the probability of malignancy being reclassified as low in 6 (26.1%) and as high in 8 (34.8%). Conclusion 18F-FDG-PET/CT was able to modify the probability of malignancy classification of a solitary pulmonary nodule in more than 50% of the cases evaluated.
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Roberts TJ, Lennes IT, Hawari S, Sequist LV, Park ER, Willers H, Frank A, Gaissert H, Shepard JA, Ryan D. Integrated, Multidisciplinary Management of Pulmonary Nodules Can Streamline Care and Improve Adherence to Recommendations. Oncologist 2019; 25:431-437. [PMID: 31876321 DOI: 10.1634/theoncologist.2019-0519] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 11/13/2019] [Indexed: 01/03/2023] Open
Abstract
Every year millions of pulmonary nodules are discovered incidentally and through lung cancer screening programs. Management of these nodules is often suboptimal, with low follow-up rates and poor provider understanding of management approaches. There is an emerging body of literature about how to optimize management of pulmonary nodules. The Pulmonary Nodule and Lung Cancer Screening Clinic (PNLCSC) at Massachusetts General Hospital was founded in 2012 to manage pulmonary nodules via a multidisciplinary approach with optimized support staff. Recommendations from clinic providers and treatment details were recorded for all patients seen at the PNLCSC. Adherence to recommendations and outcomes were also tracked and reviewed. From October 2012 to September 2019, 1,136 patients were seen at the PNLCSC, each for a mean of 1.8 appointments (range, 1-10). A total of 356 procedures were recommended by the clinic and 271 patients were referred for surgery and/or radiation. The majority of interventions (74%) were recommended at the initial PNLCSC appointment. In total, 211 patients (19%) evaluated at the PNLCSC had pathologically confirmed pulmonary malignancies or were treated empirically with radiation. Among patients followed by the clinic, the adherence rate to clinic recommendations was 95%. This study shows how a multidisciplinary approach to pulmonary nodule management can streamline care and optimize follow-up. The PNLCSC provides a template that can be replicated in other health systems. It also provides an example of how multidisciplinary approaches can be applied to other complex conditions. IMPLICATIONS FOR PRACTICE: This work demonstrates how an integrated, multidisciplinary approach to management of pulmonary nodules can streamline patient care and improve adherence to provider recommendations. This approach has the potential to improve patient outcomes and reduce health care costs.
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Affiliation(s)
- Thomas J Roberts
- Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Inga T Lennes
- Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
- Department of Hematology/Oncology, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
- Massachusetts General Hospital Cancer Center, Boston, Massachusetts, USA
| | - Saif Hawari
- Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Lecia V Sequist
- Department of Hematology/Oncology, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
- Massachusetts General Hospital Cancer Center, Boston, Massachusetts, USA
| | - Elyse R Park
- Department of Psychiatry, Massachusetts General Hospital, Boston, Massachusetts, USA
- Health Policy Research Center, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Henning Willers
- Thoracic Radiation Oncology Program, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Angela Frank
- Department of Pulmonary & Critical Care Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Henning Gaissert
- Department of Surgery, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Jo-Anne Shepard
- Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - David Ryan
- Department of Hematology/Oncology, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
- Massachusetts General Hospital Cancer Center, Boston, Massachusetts, USA
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Eberhard M, Stocker D, Milanese G, Martini K, Nguyen-Kim TDL, Wurnig MC, Frauenfelder T, Baumueller S. Volumetric assessment of solid pulmonary nodules on ultralow-dose CT: a phantom study. J Thorac Dis 2019; 11:3515-3524. [PMID: 31559058 DOI: 10.21037/jtd.2019.08.12] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Background To reduce the radiation exposure from chest computed tomography (CT), ultralow-dose CT (ULDCT) protocols performed at sub-millisievert levels were previously tested for the evaluation of pulmonary nodules (PNs). The purpose of our study was to investigate the effect of ULDCT and iterative image reconstruction on volumetric measurements of solid PNs. Methods CT datasets of an anthropomorphic chest phantom containing solid microspheres were obtained with a third-generation dual-source CT at standard dose, 1/8th, 1/20th and 1/70th of standard dose [CT volume dose index (CTDIvol): 0.03-2.03 mGy]. Semi-automated volumetric measurements were performed on CT datasets reconstructed with filtered back projection (FBP) and advanced modelled iterative reconstruction (ADMIRE), at strength level 3 and 5. Absolute percentage error (APE) evaluated measurement accuracy related to the effective volume. Scan repetition differences were evaluated using Bland-Altman analysis. Two-way analysis of variance (ANOVA) assessed influence of different scan parameters on APE. Proportional differences (PDs) tested the effect of dose settings and reconstruction algorithms on volumetric measurements, as compared to the standard protocol (standard dose-FBP). Results Bland-Altman analysis revealed small mean interscan differences of APE with narrow limits of agreement (-0.1%±4.3% to -0.3%±3.8%). Dose settings (P<0.001), reconstruction algorithms (P<0.001), nodule diameters (P<0.001) and nodule density (P=0.011) had statistically significant influence on APE. Post-hoc Bonferroni tests showed slightly higher APE when scanning with 1/70th of standard dose [mean difference: 3.4%, 95% confidence interval (CI): 2.5-4.3%; P<0.001], and for image reconstruction with ADMIRE5 (mean difference: 1.8%, 95% CI: 1.0-2.5%; P<0.001). No significant differences for scanning with 1/20th of standard dose (P=0.42), and image reconstruction with ADMIRE3 (P=0.19) were found. Scanning with 1/70th of standard dose and image reconstruction with FBP showed the widest range of PDs (-16.8% to 23.4%) compared to standard dose-FBP. Conclusions Our phantom study showed no significant difference between nodule volume measurements on standard dose CT (CTDIvol: 2 mGy) and ULDCT with 1/20th of standard dose (CTDIvol: 0.10 mGy).
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Affiliation(s)
- Matthias Eberhard
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland
| | - Daniel Stocker
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland
| | - Gianluca Milanese
- Division of Radiology, Department of Medicine and Surgery (DiMeC), University of Parma, Parma, Italy
| | - Katharina Martini
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland
| | - Thi Dan Linh Nguyen-Kim
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland
| | - Moritz C Wurnig
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland
| | - Thomas Frauenfelder
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland
| | - Stephan Baumueller
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland
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