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Huang EY, Reeves JJ, Broderick RC, Serra JL, Goldhaber NH, An JY, Fowler KJ, Hosseini M, Sandler BJ, Jacobsen GR, Horgan S, Clary BM. Distinguishing characteristics of xanthogranulomatous cholecystitis and gallbladder adenocarcinoma: a persistent diagnostic dilemma. Surg Endosc 2024; 38:348-355. [PMID: 37783778 DOI: 10.1007/s00464-023-10461-8] [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: 04/11/2023] [Accepted: 09/06/2023] [Indexed: 10/04/2023]
Abstract
BACKGROUND Xanthogranulomatous cholecystitis (XGC) is an uncommon variant of chronic cholecystitis which can resemble gallbladder adenocarcinoma (GAC) on preoperative imaging and present technical challenges in the performance of cholecystectomy. We examined our experience with each pathology to identify distinguishing characteristics that may guide patient counseling and surgical management. METHODS A retrospective review of all pathologically confirmed cases of XGC and GAC following cholecystectomy between 2015 and 2021 at a single institution was performed. Clinical, biochemical, radiographic, and intraoperative features were compared. RESULTS There were 37 cases of XGC and 20 cases of GAC. Patients with GAC were older (mean 70.3 years vs 58.0, p = 0.01) and exclusively female (100% vs 45.9%, p < 0.0001). There were no significant differences in accompanying symptoms between groups (nausea/vomiting, fevers, or jaundice). The mean maximum white blood cell count was elevated for XGC compared to GAC (16.4 vs 8.6 respectively, p = 0.044); however, there were no differences in the remainder of the biochemical profile, including bilirubin, liver transaminases, CEA, and CA 19-9. The presence of an intraluminal mass (61.1% vs 9.1%, p = 0.0001) and lymphadenopathy (18.8%. vs 0.0%, p = 0.045) were associated with malignancy, whereas gallbladder wall thickening as reported on imaging (87.9% vs 38.9%, p = 0.0008) and gallstones (76.5% vs. 50.0%, p = 0.053) were more often present with XGC. Cases of XGC more often had significant adhesions/inflammation (83.8% vs 55.0%, p = 0.03). CONCLUSION Clinical features that may favor benign chronic cholecystitis over gallbladder adenocarcinoma include younger age, male gender, current or prior leukocytosis, and the absence of an intraluminal mass or lymphadenopathy. Laparoscopic cholecystectomy is a safe surgical option for equivocal presentations. Intraoperative frozen section or intentional staging of more extensive procedures based upon final histopathology are valuable surgical strategies.
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Affiliation(s)
- Estella Y Huang
- Division of Minimally Invasive Surgery, Department of Surgery, Center for the Future of Surgery, University of California, San Diego, 9500 Gilman Drive, MET Building 845, La Jolla, San Diego, CA, 92093-0740, USA.
| | - James J Reeves
- Division of Minimally Invasive Surgery, Department of Surgery, Center for the Future of Surgery, University of California, San Diego, 9500 Gilman Drive, MET Building 845, La Jolla, San Diego, CA, 92093-0740, USA
| | - Ryan C Broderick
- Division of Minimally Invasive Surgery, Department of Surgery, Center for the Future of Surgery, University of California, San Diego, 9500 Gilman Drive, MET Building 845, La Jolla, San Diego, CA, 92093-0740, USA
| | - Joaquin L Serra
- Division of Minimally Invasive Surgery, Department of Surgery, Center for the Future of Surgery, University of California, San Diego, 9500 Gilman Drive, MET Building 845, La Jolla, San Diego, CA, 92093-0740, USA
| | - Nicole H Goldhaber
- Division of Minimally Invasive Surgery, Department of Surgery, Center for the Future of Surgery, University of California, San Diego, 9500 Gilman Drive, MET Building 845, La Jolla, San Diego, CA, 92093-0740, USA
| | - Julie Y An
- Department of Radiology, University of California, San Diego, San Diego, CA, USA
| | - Kathryn J Fowler
- Department of Radiology, University of California, San Diego, San Diego, CA, USA
| | - Mojgan Hosseini
- Department of Pathology, University of California, San Diego, San Diego, CA, USA
| | - Bryan J Sandler
- Division of Minimally Invasive Surgery, Department of Surgery, Center for the Future of Surgery, University of California, San Diego, 9500 Gilman Drive, MET Building 845, La Jolla, San Diego, CA, 92093-0740, USA
| | - Garth R Jacobsen
- Division of Minimally Invasive Surgery, Department of Surgery, Center for the Future of Surgery, University of California, San Diego, 9500 Gilman Drive, MET Building 845, La Jolla, San Diego, CA, 92093-0740, USA
| | - Santiago Horgan
- Division of Minimally Invasive Surgery, Department of Surgery, Center for the Future of Surgery, University of California, San Diego, 9500 Gilman Drive, MET Building 845, La Jolla, San Diego, CA, 92093-0740, USA
| | - Bryan M Clary
- Division of Surgical Oncology, Department of Surgery, University of California, San Diego, San Diego, CA, USA
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Kim K, Kim M, Lim W, Kim BH, Park SK. The Concept of Economic Evaluation and Its Application in Thyroid Cancer Research. Endocrinol Metab (Seoul) 2021; 36:725-736. [PMID: 34474512 PMCID: PMC8419602 DOI: 10.3803/enm.2021.1164] [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: 06/22/2021] [Accepted: 07/28/2021] [Indexed: 02/06/2023] Open
Abstract
Economic evaluation is a type of comparative analysis between interventions in terms of both their resource use and health outcomes. Due to the good prognosis of thyroid cancer (TC), the socioeconomic burden of TC patients post-diagnosis is increasing. Therefore, economic evaluation studies focusing on TC are recommended. This study aimed to describe the concept and methods of economic evaluation and reviewed previous TC studies. Several previous studies compared the costs of interventions or evaluated recurrence, complications, or quality of life as measures of their effectiveness. Regarding costs, most studies focused on direct costs and applied hypothetical models. Cost-minimization analysis should be distinguished from simple cost analysis. Furthermore, due to the universality of the term "cost-effectiveness analysis" (CEA), several studies have not distinguished CEA from cost-utility analysis; this point needs to be considered in future research. Cost-benefit analyses have not been conducted in previous TC research. Since TC has a high survival rate and good prognosis, the need for economic evaluations has recently been pointed out. Therefore, correct concepts and methods are needed to obtain clear economic evaluation results. On this basis, it will be possible to provide appropriate guidelines for TC treatment and management in the future.
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Affiliation(s)
- Kyungsik Kim
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul,
Korea
- Department of Biomedical Sciences, Seoul National University Graduate School, Seoul,
Korea
- Cancer Research Institute, Seoul National University, Seoul,
Korea
| | - Mijin Kim
- Department of Internal Medicine, Biomedical Research Institute, Pusan National University Hospital, Busan,
Korea
| | - Woojin Lim
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul,
Korea
- Department of Biomedical Sciences, Seoul National University Graduate School, Seoul,
Korea
- Cancer Research Institute, Seoul National University, Seoul,
Korea
| | - Bo Hyun Kim
- Department of Internal Medicine, Biomedical Research Institute, Pusan National University Hospital, Busan,
Korea
| | - Sue K. Park
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul,
Korea
- Cancer Research Institute, Seoul National University, Seoul,
Korea
- Integrated Major in Innovative Medical Science, Seoul National University College of Medicine, Seoul,
Korea
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Uçan B, Şahin M, Özbek M, Kızılgül M, Sayki Arslan M, Çalışkan M, Saylam G, Çakal E. Lobectomy may not be suitable for patients with follicular neoplasm cytology. Turk J Med Sci 2020; 50:8-11. [PMID: 31340635 PMCID: PMC7080349 DOI: 10.3906/sag-1610-125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 02/25/2017] [Indexed: 11/04/2022] Open
Abstract
Background/aim The most appropriate surgical management of follicular neoplasm/suspicious for follicular neoplasm (FN) lesions is still contradictory. We aimed to evaluate the data of our patients with follicular neoplasm treated with thyroidectomy. Materials and methods We retrospectively analyzed the data of 74 patients who were diagnosed with follicular neoplasm cytology (FN cytology) by fine needle aspiration biopsy (FNAB) and had undergone total thyroidectomy or lobectomy with isthmectomy (LwI). Results We examined a total of 74 patients, of which 64 (83.7%) were female and 10 (16.3%) were male. The malignancy rate in the pathological examinations of these patients was 31/74 (41.9%). The most common cancer among the patients with malignancy was papillary thyroid carcinomas (PTC) (20/31, 65%). Among the subtypes of PTCs, 11 were classical PTC, 5 were a follicular variant of PTC, 2 were the oncocytic variant of PTC, 1 was the diffuse sclerosing variant, and 1 was a columnar cell variant of PTC. Conclusion Since most FN cytology has been pathologically diagnosed with papillary cancer and some papillary cancer subtypes have been unfavorable pathologically, total thyroidectomy should be the most suitable treatment option in this group. Lobectomy with LwI is not suitable for patients with FNAB-proven FN cytology.
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Affiliation(s)
- Bekir Uçan
- Department of Endocrinology and Metabolism, Dışkapı Yıldırım Beyazıt Training and Research Hospital, Ankara, Turkey
| | - Mustafa Şahin
- Department of Endocrinology and Metabolism, School of Medicine, Ankara University, Ankara, Turkey
| | - Mustafa Özbek
- Department of Endocrinology and Metabolism, Dışkapı Yıldırım Beyazıt Training and Research Hospital, Ankara, Turkey
| | - Muhammed Kızılgül
- Department of Endocrinology and Metabolism, Dışkapı Yıldırım Beyazıt Training and Research Hospital, Ankara, Turkey
| | - Müyesser Sayki Arslan
- Department of Endocrinology and Metabolism, Dışkapı Yıldırım Beyazıt Training and Research Hospital, Ankara, Turkey
| | - Mustafa Çalışkan
- Department of Endocrinology and Metabolism, Dışkapı Yıldırım Beyazıt Training and Research Hospital, Ankara, Turkey
| | - Güleser Saylam
- Department of Otolaryngology and Head & Neck Surgery, Dışkapı Yıldırım Beyazıt Training and Research Hospital, Ankara, Turkey
| | - Erman Çakal
- Department of Endocrinology and Metabolism, Dışkapı Yıldırım Beyazıt Training and Research Hospital, Ankara, Turkey
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Grisales J, Sanabria A. Utility of Routine Frozen Section of Thyroid Nodules Classified as Follicular Neoplasm. Am J Clin Pathol 2020; 153:210-220. [PMID: 31732728 DOI: 10.1093/ajcp/aqz152] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVES To evaluate the diagnostic performance of frozen section in thyroid nodules classified as follicular neoplasm. METHODS A diagnostic test meta-analysis was designed. Studies that assessed frozen section in patients with thyroid nodules and a fine-needle aspiration biopsy result of Bethesda IV were selected. The outcomes measured were the number of false- and true-positive and -negative results. We used the Quality Assessment of Diagnostic Accuracy Studies 2 (QUADAS-2) instrument for methodological quality assessment and a bivariate mixed-effects regression framework and a likelihood-based estimation of the exact binomial approach. RESULTS Forty-six studies from 1991 to 2018 were included. Most studies had moderate methodological quality. The overall sensitivity and specificity were 43% (95% confidence internal [CI], 0.34-0.53) and 100% (95% CI, 0.99-1.00), respectively. The hierarchic summary receiver operating characteristic curve showed an area under the curve of 0.91 (95% CI, 0.80-0.97). CONCLUSIONS Frozen section demonstrates moderate diagnostic performance in patients with follicular neoplasm, and its utility for making intraoperative decisions is limited. Its routine use should be discouraged.
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Affiliation(s)
- Jhorman Grisales
- Department of Surgery, School of Medicine, Universidad de Antioquia, Medellín, Colombia
| | - Alvaro Sanabria
- Department of Surgery, School of Medicine, Universidad de Antioquia, Medellín, Colombia
- Centro de Excelencia en Cirugia de Cabeza y Cuello, CEXCA, Medellín, Colombia
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Zoratti MJ, Zhou T, Chan K, Levine O, Krahn M, Husereau D, Clifford T, Schunemann H, Guyatt G, Xie F. Health Utility Book (HUB)-Cancer: Protocol for a Systematic Literature Review of Health State Utility Values in Cancer. MDM Policy Pract 2019; 4:2381468319852594. [PMID: 31453359 PMCID: PMC6696850 DOI: 10.1177/2381468319852594] [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: 12/05/2018] [Accepted: 04/08/2019] [Indexed: 11/16/2022] Open
Abstract
Background. Treatment options in oncology are rapidly advancing, and public payer systems are increasingly under pressure to adopt new but expensive cancer treatments. Cost-utility analyses (CUAs) are used to estimate the relative costs and effects of competing interventions, where health outcomes are measured using quality-adjusted life years (QALYs). Health state utility values (HSUVs) are used to reflect health-related quality of life or health status in the calculation of QALYs. To support reimbursement agencies in the appraisal of oncology drug submissions, which typically include a CUA component, we have proposed a systematic literature review of published HSUV estimates in the field of oncology. Methods. The following databases will be searched: MEDLINE, EMBASE, EconLit, and CINAHL. A team of reviewers, working independently and in duplicate, will evaluate abstracts and full-text publications for eligibility against broad inclusion criteria. Studies using a direct, indirect, or combination approach to eliciting preferences related to cancer or cancer treatments are eligible. Data extraction will capture details of study methodology, participants, health states, and corresponding HSUVs. We will summarize our findings with descriptive analyses at this stage. A pilot review in thyroid cancer is presented to illustrate the proposed methods. Discussion. This systematic review will generate a comprehensive summary of the oncology HSUV literature. As a component of the Health Utility Book (HUB) project, we anticipate that this work will assist both health economic modelers as well as critical reviewers in the development and appraisal of CUAs in oncology.
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Affiliation(s)
- Michael James Zoratti
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
| | - Ting Zhou
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
| | - Kelvin Chan
- Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - Oren Levine
- Department of Oncology, McMaster University, Hamilton, Ontario, Canada
| | - Murray Krahn
- Toronto General Hospital, Toronto, Ontario, Canada
| | - Don Husereau
- Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Tammy Clifford
- Canadian Institutes for Health Research, Ottawa, Ontario, Canada
| | - Holger Schunemann
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
| | - Gordon Guyatt
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
| | - Feng Xie
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
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Bollig CA, Jorgensen JB, Zitsch RP, Dooley LM. Utility of Intraoperative Frozen Section in Large Thyroid Nodules. Otolaryngol Head Neck Surg 2018; 160:49-56. [PMID: 30322356 DOI: 10.1177/0194599818802183] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE To determine if the routine use of intraoperative frozen section (iFS) results in cost savings among patients with nodules >4 cm with nonmalignant cytology undergoing a thyroid lobectomy. STUDY DESIGN Case series with chart review; cost minimization analysis. SETTING Single academic center. SUBJECTS AND METHODS Records were reviewed on a consecutive sample of 48 patients with thyroid nodules >4 cm and nonmalignant cytology who were undergoing thyroid lobectomy in which iFS was performed between 2010 and 2015. A decision tree model of thyroid lobectomy with iFS was created. Comparative parameters were obtained from the literature. A cost minimization analysis was performed comparing lobectomy with and without iFS and the need for completion thyroidectomy with costs estimated according to 2014 data from Medicare, the Bureau of Labor Statistics, and the Nationwide Inpatient Sample. RESULTS The overall malignancy rate was 25%, and 33% of these malignancies were identified intraoperatively. When the malignancy rates obtained from our cohort were applied, performing routine iFS was the less costly scenario, resulting in a savings of $486 per case. When the rate of malignancy identified on iFS was adjusted, obtaining iFS remained the less costly scenario as long as the rate of malignancies identified on iFS exceeded 12%. If patients with follicular lesions on cytology were excluded, 50% of malignancies were identified intraoperatively, resulting in a savings of $768 per case. CONCLUSIONS For patients with nodules >4 cm who are undergoing a diagnostic lobectomy, the routine use of iFS may result in decreased health care utilization. Additional cost savings could be obtained if iFS is avoided among patients with follicular lesions.
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Affiliation(s)
- Craig A Bollig
- 1 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, Missouri, USA
| | - Jeffrey B Jorgensen
- 1 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, Missouri, USA
| | - Robert P Zitsch
- 1 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, Missouri, USA
| | - Laura M Dooley
- 1 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, Missouri, USA
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7
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Grani G, Lamartina L, Durante C, Filetti S, Cooper DS. Follicular thyroid cancer and Hürthle cell carcinoma: challenges in diagnosis, treatment, and clinical management. Lancet Diabetes Endocrinol 2018; 6:500-514. [PMID: 29102432 DOI: 10.1016/s2213-8587(17)30325-x] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 09/06/2017] [Accepted: 09/07/2017] [Indexed: 12/16/2022]
Abstract
Follicular thyroid cancer is the second most common differentiated thyroid cancer histological type and has been overshadowed by its more common counterpart-papillary thyroid cancer-despite its unique biological behaviour and less favourable outcomes. In this Review, we comprehensively review the literature on follicular thyroid cancer to provide an evidence-based guide to the management of these tumours, to highlight the lack of evidence behind guideline recommendations, and to identify changes and challenges over the past decades in diagnosis, prognosis, and treatment. We highlight that correct identification of cancer in indeterminate cytological samples is challenging and ultrasonographic features can be misleading. Despite certain unique aspects of follicular thyroid cancer presentation and prognosis, no specific recommendations exist for follicular thyroid cancer and Hürthle cell carcinoma in evidence-based guidelines. Efforts should be made to stimulate additional research in this field.
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Affiliation(s)
- Giorgio Grani
- Dipartimento di Medicina Interna e Specialità Mediche, University of Rome, Sapienza, Rome, Italy
| | - Livia Lamartina
- Dipartimento di Medicina Interna e Specialità Mediche, University of Rome, Sapienza, Rome, Italy
| | - Cosimo Durante
- Dipartimento di Medicina Interna e Specialità Mediche, University of Rome, Sapienza, Rome, Italy
| | - Sebastiano Filetti
- Dipartimento di Medicina Interna e Specialità Mediche, University of Rome, Sapienza, Rome, Italy
| | - David S Cooper
- Division of Endocrinology, Diabetes, and Metabolism, The Johns Hopkins School of Medicine, Baltimore, MD, USA.
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Bollig CA, Gilley D, Lesko D, Jorgensen JB, Galloway TL, Zitsch RP, Dooley LM. Economic Impact of Frozen Section for Thyroid Nodules with "Suspicious for Malignancy" Cytology. Otolaryngol Head Neck Surg 2018; 158:257-264. [PMID: 29292662 DOI: 10.1177/0194599817740328] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective To perform a cost analysis of the routine use of intraoperative frozen section (iFS) among patients undergoing a thyroid lobectomy with "suspicious for malignancy" (SUSP) cytology in the context of the 2015 American Thyroid Association guidelines. Study Design Case series with chart review; cost minimization analysis. Setting Academic. Subjects and Methods Records were reviewed for patients with SUSP cytology who underwent thyroid surgery between 2010 and 2015 in which iFS was utilized. The diagnostic test performance of iFS and the frequency of indicated completion/total thyroidectomies based on the 2015 guidelines were calculated. A cost minimization analysis was performed comparing lobectomy, with and without iFS, and the need for completion thyroidectomy according to costs estimated from 2014 data from Medicare, the Bureau of Labor Statistics, and the Nationwide Inpatient Sample. Results Sixty-five patients met inclusion criteria. The malignancy rate was 61.5%, 45% of which was identified intraoperatively. The specificity and positive predictive value were 100%. The negative predictive value and sensitivity were 83% and 95%, respectively. Completion/total thyroidectomy was indicated for 9% of patients; 83% of these individuals had findings on iFS that would have changed management intraoperatively. Application of the new guidelines would have resulted in a significant reduction in the frequency of conversion to a total thyroidectomy when compared with the actual management (26.1% vs 7.7%, P = .005). Performing routine iFS was the less costly scenario, resulting in a savings of $474 per case. Conclusion For patients with SUSP cytology undergoing lobectomy, routine use of iFS would result in decreased health care utilization.
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Affiliation(s)
- Craig A Bollig
- 1 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, Missouri, USA
| | - David Gilley
- 2 School of Medicine, University of Missouri, Columbia, Missouri, USA
| | - David Lesko
- 2 School of Medicine, University of Missouri, Columbia, Missouri, USA
| | - Jeffrey B Jorgensen
- 1 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, Missouri, USA
| | - Tabitha L Galloway
- 1 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, Missouri, USA
| | - Robert P Zitsch
- 1 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, Missouri, USA
| | - Laura M Dooley
- 1 Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, Missouri, USA
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Wang T, Kim HY, Wu CW, Rausei S, Sun H, Pergolizzi FP, Dionigi G. Analyzing cost-effectiveness of neural-monitoring in recurrent laryngeal nerve recovery course in thyroid surgery. Int J Surg 2017; 48:180-188. [PMID: 29030215 DOI: 10.1016/j.ijsu.2017.10.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 09/21/2017] [Accepted: 10/02/2017] [Indexed: 12/25/2022]
Abstract
PURPOSE The increasing use of intraoperative neural monitoring (IONM) of the recurrent laryngeal nerve (RLN) during thyroid surgery imposes an evaluation of cost-effectiveness. METHODS The analysis estimated the cost versus utility of different alternatives that simulate nerve injury course and the consequences for the following cohorts of patients: (1) no RLN injury, or vocal fold palsy (VCP) recovery within 1 month (2), 2 months (3), 6 months (4), and after 12 months (5). In the model applied, the average simulated cohort consisted of a young female patient, 40 years old, employed, daily voice user, who underwent elective, conventional total thyroidectomy via cervical incision using a standardized intermittent IONM technique, for an operable benign, bilateral, diffuse, multinodular, non-toxic, non-retrosternal goiter. RESULTS IONM was cost-ineffective when parameters such as the rates of transient vocal fold palsy (VCP) reached 38.5%. IONM was cost-effective if the rate of VCP was 33.6% at 1 month, 22.9% at 2 months, 9.8% at 6 months, and 3.8% at 12 months, independent of phono-surgery. The described scenario is cost-effective only in a high-volume setting. CONCLUSIONS This study used simulation economic modeling to assess clinical and cost-effectiveness utility of IONM implementation. In light of the limitations of a simulation-based study, we conclusively assumed that IONM is cost-effective for permeant RLN injuries.
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Affiliation(s)
- Tie Wang
- Jilin Provincial Key Laboratory of Surgical Translational Medicine, China-Japan Union Hospital of Jilin University, Division of Thyroid Surgery, Changchun City, Jilin Province, China
| | - Hoon Yub Kim
- Department of Surgery, Korea University College of Medicine, Seoul, Republic of Korea
| | - Che-Wei Wu
- Department of Otolaryngology, Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung Medical University Hospital, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung City, Taiwan
| | | | - Hui Sun
- Jilin Provincial Key Laboratory of Surgical Translational Medicine, China-Japan Union Hospital of Jilin University, Division of Thyroid Surgery, Changchun City, Jilin Province, China.
| | - Francesca Pia Pergolizzi
- Division for Endocrine and Minimally Invasive Surgery, Department of Human Pathology in Adulthood and Childhood "G. Barresi", University Hospital G. Martino, University of Messina, Via C. Valeria 1, 98125, Messina, Italy
| | - Gianlorenzo Dionigi
- Division for Endocrine and Minimally Invasive Surgery, Department of Human Pathology in Adulthood and Childhood "G. Barresi", University Hospital G. Martino, University of Messina, Via C. Valeria 1, 98125, Messina, Italy.
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10
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Bollig CA, Lesko D, Gilley D, Dooley LM. The futility of intraoperative frozen section in the evaluation of follicular thyroid lesions. Laryngoscope 2017; 128:1501-1505. [PMID: 28990674 DOI: 10.1002/lary.26937] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 06/22/2017] [Accepted: 08/29/2017] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Investigate the utility of intraoperative frozen section (iFS) in patients with follicular thyroid lesions following publication of the 2015 American Thyroid Association (ATA) guidelines. STUDY DESIGN Retrospective chart review. METHODS Patient demographics, preoperative cytology, frozen pathology, and final pathology were reviewed on patients undergoing thyroid surgery at a tertiary care hospital in which iFS was utilized over a 5-year period. The test performance of iFS and the frequency of indicated completion/total thyroidectomies pre- and postpublication of the 2015 ATA guidelines were calculated. RESULTS One hundred and one patients met inclusion criteria: 54 patients with follicular lesions of undetermined significance (FLUS) and 47 patients with a cytologic diagnosis of suspicious for follicular neoplasm/follicular neoplasm. The malignancy rate was 36%, but only 14% of malignancies were identified on iFS. A definitive benign or malignant diagnosis was given on iFS in only 21% of cases, and operative management was altered in two cases as a result of iFS. There was a statistically significant reduction in the frequency of indicated total/completion thyroidectomies based on high-risk features as a result of the 2015 ATA guidelines compared to prior recommendations (20.8% vs. 5.0%, P = < 0.001). None of these patients had findings on iFS that would have altered management intraoperatively. CONCLUSION Intraoperative frozen section offers minimal diagnostic utility in the evaluation of follicular thyroid lesions. Updates in the 2015 ATA guidelines further diminish its potential to impact management intraoperatively. Significant improvements in its ability to identify malignancies would be needed to justify its use. LEVEL OF EVIDENCE 4. Laryngoscope, 128:1501-1505, 2018.
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Affiliation(s)
- Craig A Bollig
- Department of Otolaryngology-Head and Neck Surgery, University of Missouri School of Medicine, Columbia, Missouri, U.S.A
| | - David Lesko
- University of Missouri School of Medicine, Columbia, Missouri, U.S.A
| | - David Gilley
- University of Missouri School of Medicine, Columbia, Missouri, U.S.A
| | - Laura M Dooley
- Department of Otolaryngology-Head and Neck Surgery, University of Missouri School of Medicine, Columbia, Missouri, U.S.A
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11
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Inversini D, Liu X, Sun H, Dionigi G. IPTH cost-effectiveness in thyroid surgery. Gland Surg 2017; 6:417-419. [PMID: 28861385 DOI: 10.21037/gs.2017.03.07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Davide Inversini
- 1st Division of General Surgery, Research Center for Endocrine Surgery, Department of Medicine and Surgery, ASST Sette Laghi Ospedale di Circolo e Fondazione Macchi-Polo Universitario, University of Insubria (Varese-Como), via Guicciardini 9, 21100 Varese, Italy
| | - Xiaoli Liu
- Jilin Provincial Key Laboratory of Surgical Translational Medicine, China Japan Union Hospital of Jilin University, Division of Thyroid Surgery, Changchun city, Jilin Province, China
| | - Hui Sun
- Jilin Provincial Key Laboratory of Surgical Translational Medicine, China Japan Union Hospital of Jilin University, Division of Thyroid Surgery, Changchun city, Jilin Province, China
| | - Gianlorenzo Dionigi
- 1st Division of General Surgery, Research Center for Endocrine Surgery, Department of Medicine and Surgery, ASST Sette Laghi Ospedale di Circolo e Fondazione Macchi-Polo Universitario, University of Insubria (Varese-Como), via Guicciardini 9, 21100 Varese, Italy
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Roychoudhury S, Souza F, Gimenez C, Glass R, Cocker R, Chau K, Kohn N, Das K. Utility of intraoperative frozen sections for thyroid nodules with prior fine needle aspiration cytology diagnosis. Diagn Cytopathol 2017; 45:789-794. [PMID: 28603866 DOI: 10.1002/dc.23765] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Revised: 05/03/2017] [Accepted: 05/17/2017] [Indexed: 11/09/2022]
Abstract
INTRODUCTION The objective of this study was to evaluate the role of intraoperative frozen section (IFS) in determining the course of surgery in thyroid nodules with a prior fine needle aspiration (FNA) biopsy diagnosis. In addition, reliability of FNA interpretation to guide surgical management without IFS was investigated. MATERIAL AND METHODS This is a retrospective study of all patients who had a FNA biopsy, IFS, and final pathology performed on a thyroid nodule over a 9 month period. The extent of surgery at the time of the IFS was recorded. Subsequent change in surgical procedure following the IFS diagnosis was noted in each of the Bethesda diagnostic categories. RESULTS 55% of the cases were deferred at IFS overall, with 68 and 86% in Bethesda III and IV categories, respectively. Overall, there was a change in management in 6% of cases. CONCLUSIONS Our study does not support the use of IFS for nodules with prior FNA interpretation of Bethesda II, III, IV and VI as management was not significantly changed. IFS is of value for nodules with prior FNA diagnosis of Bethesda I for interpretation of nodule, and Bethesda V for planning surgery. A confirmatory diagnosis could not be rendered at IFS for lesions with follicular architecture, which comprised most of the cases in Bethesda III and IV.
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Affiliation(s)
- Sudarshana Roychoudhury
- Department of Pathology, Hofstra Northwell Health School of Medicine, Lake Success, New York
| | - Fabiola Souza
- Department of Pathology, Hofstra Northwell Health School of Medicine, Lake Success, New York
| | - Cecilia Gimenez
- Department of Pathology, Hofstra Northwell Health School of Medicine, Lake Success, New York
| | - Ryan Glass
- Department of Pathology, Hofstra Northwell Health School of Medicine, Lake Success, New York
| | - Rubina Cocker
- Department of Pathology, Hofstra Northwell Health School of Medicine, Lake Success, New York
| | - Karen Chau
- Department of Pathology, Hofstra Northwell Health School of Medicine, Lake Success, New York
| | - Nina Kohn
- Department of Biostatistics Manhasset, The Feinstein Institute for Medical Research, New York
| | - Kasturi Das
- Department of Pathology, Hofstra Northwell Health School of Medicine, Lake Success, New York
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Frozen section analysis in the post-Bethesda era. J Surg Res 2016; 205:393-397. [DOI: 10.1016/j.jss.2016.06.072] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 06/16/2016] [Accepted: 06/27/2016] [Indexed: 11/23/2022]
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Oosterhoff M, van der Maas ME, Steuten LMG. A Systematic Review of Health Economic Evaluations of Diagnostic Biomarkers. APPLIED HEALTH ECONOMICS AND HEALTH POLICY 2016; 14:51-65. [PMID: 26334528 PMCID: PMC4740568 DOI: 10.1007/s40258-015-0198-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
BACKGROUND Diagnostic biomarkers have multiple applications along the care process and have a large potential in optimizing treatment decisions. However, many diagnostic biomarkers struggle to gain market access and obtain appropriate coverage because of a lack of evidence on their health economic impact. OBJECTIVES The aim was to review the (methodological) characteristics of recent economic evaluations on diagnostic biomarkers and examine whether these studies dealt with specific issues such as different payer perspectives, preference heterogeneity, and multiple applications in subpopulations. METHODS The PubMed database and the National Health Service Economic Evaluation Database were searched. Full economic evaluations published after 2009 assessing diagnostic biomarkers for the main non-communicable diseases in middle-income or high-income countries were considered eligible. Empirical and methodological study characteristics were summarized, as was the handling of specific issues related to the economic evaluation of personalized medicine. RESULTS Thirty-three economic evaluations were included, of which 25 were model-based analyses. The number of strategies compared ranged from two to 17 per study, and was especially large in studies assessing genetic testing in patients and their relatives. Cost-effectiveness results were most sensitive to test accuracy and costs of the biomarker (N = 7), the relative risk of an event (N = 4), and the proportion of people accepting genetic testing (N = 2). One study incorporated patient preferences, and none of the studies considered different payer perspectives, cost sharing arrangements or variable opportunity costs due to population density variability. CONCLUSIONS Published health economic evaluations of biomarkers used for diagnosing, staging diseases, and guiding treatment selection are characterized by a large number of comparators to model the potential clinical applications and to determine their value. Assessing outcomes beyond health as well as specific issues, such as different payer perspectives and patient preferences, is crucial to fully capture the potential health economic impact of diagnostic biomarkers and to inform value-based reimbursement.
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Affiliation(s)
- Marije Oosterhoff
- Panaxea b.v., Hengelosestraat 221, 7521 AC, Enschede, The Netherlands.
| | | | - Lotte M G Steuten
- Panaxea b.v., Hengelosestraat 221, 7521 AC, Enschede, The Netherlands.
- Fred Hutchinson Cancer Research Center, Seattle, USA.
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Cohen MA, Patel KR, Gromis J, Kutler DI, Kuhel WI, Stater BJ, Schulman A, Hoda RS, Scognamiglio T. Retrospective evaluation of frozen section use for thyroid nodules with a prior fine needle aspiration diagnosis of Bethesda II-VI: The Weill Cornell Medical College experience. World J Otorhinolaryngol Head Neck Surg 2015; 1:5-10. [PMID: 29204534 PMCID: PMC5698504 DOI: 10.1016/j.wjorl.2015.09.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Indexed: 11/20/2022] Open
Abstract
Objective To evaluate the Weill Cornell Medical College (WCMC)/New York Presbyterian Hospital (NYPH) experience with intraoperative frozen (IOF) section in the management of thyroid nodules with a fine needle aspiration (FNA) diagnosis of Bethesda II–VI and to analyze the cost and pathology benefit it provides. Methods The surgical and cytopathology files at WCMC/NYPH were searched within the time period of January 2008 to May 2013. A total of 435 thyroid specimens were identified for which both an FNA and subsequent IOF section was performed. The FNA was correlated with the locations of the resected nodule and the nodule frozen for intraoperative diagnosis. The results of the FNA were compared to the IOF section diagnosis and final diagnosis (FD). Results Among 435 cases, the FNA diagnosis was Bethesda II: 149 cases, Bethesda III: 170 cases, Bethesda IV: 91 cases, Bethesda V: 19 cases, and Bethesda VI: 6 cases. There were a total of 83 carcinomas identified on FD, which included 69 papillary thyroid carcinomas (PTCs), 12 follicular carcinomas, and 2 poorly differentiated carcinomas. The preoperative FNA diagnosis for these carcinomas was as follows: Bethesda II, 11/149 (7.4%), Bethesda III, 24/170 (14%), Bethesda IV, 26/91 (29%), Bethesda V, 16/19 (84%), and Bethesda VI, 6/6 (100%). IOF section contributed to the diagnosis of malignancy in 16/429 (4%) cases: 1/149 (0.7%) Bethesda II, 5/170 (3%) Bethesda III, 2/91 (1.1%) Bethesda IV, and 8/19 (42%) Bethesda V. The diagnosis of malignancy was confirmed in the 6 Bethesda VI cases by IOF section. There were no false positives on IOF section. IOF had a sensitivity and specificity of 26% and 100%, respectively. Conclusion The role of IOF section is limited in the evaluation of thyroid nodules. IOF section is most useful for nodules with an FNA diagnosis of Bethesda V lesions. The diagnosis of follicular variant of PTC remains difficult on frozen section.
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Affiliation(s)
- Marc A. Cohen
- Department of Otolaryngology—Head and Neck Surgery, New York Presbyterian Hospital/Weill Cornell Medical Center, New York, NY 10065, USA
- Corresponding author. Tel.: +1 646 962 2286; fax: +1 646 962 0030.
| | | | | | - David I. Kutler
- Department of Otolaryngology—Head and Neck Surgery, New York Presbyterian Hospital/Weill Cornell Medical Center, New York, NY 10065, USA
| | - William I. Kuhel
- Department of Otolaryngology—Head and Neck Surgery, New York Presbyterian Hospital/Weill Cornell Medical Center, New York, NY 10065, USA
| | - Brian J. Stater
- Department of Otolaryngology—Head and Neck Surgery, New York Presbyterian Hospital/Weill Cornell Medical Center, New York, NY 10065, USA
| | - Aaron Schulman
- Department of Endocrinology, New York Presbyterian Hospital/Weill Cornell Medical Center, New York, NY 10065, USA
| | - Rana S. Hoda
- Department of Pathology & Laboratory Medicine, New York Presbyterian Hospital/Weill Cornell Medical Center, New York, NY 10065, USA
| | - Theresa Scognamiglio
- Department of Pathology & Laboratory Medicine, New York Presbyterian Hospital/Weill Cornell Medical Center, New York, NY 10065, USA
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Analysis of an institutional protocol for thyroid lobectomy: Utility of routine intraoperative frozen section and expedited (overnight) pathology. Surgery 2015; 159:512-7. [PMID: 26361834 DOI: 10.1016/j.surg.2015.07.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2015] [Revised: 07/10/2015] [Accepted: 07/25/2015] [Indexed: 01/21/2023]
Abstract
BACKGROUND Intraoperative frozen section (FS) often is performed in patients who undergo thyroid lobectomy to determine the need for completion thyroidectomy. At our institution, if FS pathology is benign, final pathology is expedited overnight. The aim of this study was to determine the utility of FS and to identify a cost-effective management algorithm for thyroid lobectomy. METHODS A retrospective review was performed of patients who underwent thyroid lobectomy between January 2009 and May 2013. Preoperative cytology ranged from "benign" to "suspicious for malignancy." Clinically significant cancers were defined as >1 cm in size, or multifocal microcarcinomas. RESULTS Of the 192 patients who underwent thyroid lobectomy with FS, FS was suspicious for malignancy in 5 (3%) patients; 1 (0.5%) underwent immediate completion thyroidectomy. On final pathology, 9 (5%) patients had clinically significant cancers and underwent completion thyroidectomy. FS had a sensitivity and positive predictive value of 22% and 40%, respectively, in identifying clinically significant thyroid cancer. Cost of thyroid lobectomy at varying rates of same-day discharge favored thyroid lobectomy without FS but with expedited pathology for all scenarios. CONCLUSION At our institution, there appears to be limited utility of FS at the time of thyroid lobectomy given the low predictive value for diagnosing a clinically significant thyroid cancer. In patients who are admitted overnight, expedited pathology is slightly less costly and may improve patient quality-of-life and decrease costs by avoiding delayed completion thyroidectomy. Overnight pathology for patients who undergo thyroid lobectomy may achieve modest cost-savings depending on institutional FS results and rates of malignancy.
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Villar del Moral JM, Soria Aledo V, Colina Alonso A, Flores Pastor B, Gutiérrez Rodríguez MT, Ortega Serrano J, Parra Hidalgo P, Ros López S. Clinical Pathway for Thyroidectomy. Cir Esp 2015; 93:283-99. [PMID: 25732107 DOI: 10.1016/j.ciresp.2014.11.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 11/17/2014] [Accepted: 11/29/2014] [Indexed: 12/14/2022]
Abstract
Clinical pathways are care plans applicable to patient care procedures that present variations in practice and a predictable clinical course. They are designed not as a substitute for clinical judgment, but rather as a means to improve the effectiveness and efficiency of the procedures. This clinical pathway is the result of a collaborative work of the Sections of Endocrine Surgery and Quality Management of the Spanish Association of Surgeons. It attempts to provide a framework for standardizing the performance of thyroidectomy, the most frequently performed operation in endocrine surgery. Along with the usual documents of clinical pathways (temporary matrix, variance tracking and information sheets, assessment indicators and a satisfaction questionnaire) it includes a review of the scientific evidence around different aspects of pre, intra and postoperative management. Among others, antibiotic and antithrombotic prophylaxis, preoperative preparation in hyperthyroidism, intraoperative neuromonitoring and systems for obtaining hemostasis are included, along with management of postoperative hypocalcemia.
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Affiliation(s)
- Jesús María Villar del Moral
- Sección de Cirugía Endocrina de la Asociación Española de Cirujanos, Servicio de Cirugía General, Hospital Universitario Virgen de las Nieves, Granada, España.
| | - Víctor Soria Aledo
- Sección de Gestión de Calidad de la Asociación Española de Cirujanos, Servicio de Cirugía General, Hospital Universitario Morales Meseguer, Murcia, España
| | - Alberto Colina Alonso
- Sección de Gestión de Calidad de la Asociación Española de Cirujanos, Servicio de Cirugía General, Hospital Universitario de Cruces, Baracaldo, Vizcaya, España
| | - Benito Flores Pastor
- Sección de Gestión de Calidad de la Asociación Española de Cirujanos, Servicio de Cirugía General, Hospital Universitario Morales Meseguer, Murcia, España
| | - María Teresa Gutiérrez Rodríguez
- Sección de Cirugía Endocrina de la Asociación Española de Cirujanos, Servicio de Cirugía General, Hospital Universitario de Basurto, Bilbao, España
| | - Joaquín Ortega Serrano
- Sección de Cirugía Endocrina de la Asociación Española de Cirujanos, Servicio de Cirugía General, Hospital Clínico Universitario de Valencia, Valencia, España
| | - Pedro Parra Hidalgo
- Sección de Gestión de Calidad de la Asociación Española de Cirujanos, Consejería de Sanidad de la Región de Murcia, Murcia, España
| | - Susana Ros López
- Sección de Cirugía Endocrina de la Asociación Española de Cirujanos, Servicio de Cirugía General, Hospital Universitario Arnau de Vilanova, Lérida, España
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Cham S, Zanocco K, Sturgeon C, Yeh MW, Harari A. Risk-based ultrasound screening for thyroid cancer in obese patients is cost-effective. Thyroid 2014; 24:975-86. [PMID: 24512476 PMCID: PMC4046196 DOI: 10.1089/thy.2013.0470] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND A higher body mass index (BMI) is associated with more advanced stages of thyroid cancer. Screening obese patients for thyroid cancer has been proposed but has yet to be examined for cost-effectiveness. The objective of this study was to assess the cost-effectiveness of ultrasound (US) screening of obese patients for thyroid cancer. METHODS A decision-tree model compared cost savings for the following: (i) base case scenario of an obese patient with thyroid nodule found by palpation, (ii) universal US screening of all obese patients, and (iii) risk-based US screening in obese patients. Risk-based screening consisted of patients who had at least one of four major identified risk factors for thyroid cancer (family history of thyroid cancer, radiation exposure, Hashimoto's thyroiditis, and/or elevated thyrotropin). Patients with nodules underwent established treatment and management guidelines. The model accounted for recurrence, complications, and long-term treatment/follow-up for five years. Outcome probabilities were identified from a literature review. Costs were estimated using a third-party payer perspective. Sensitivity analyses were performed to examine the impact of risk factor prevalence and US cost on the model. RESULTS The resulted costs per patient were $210.73 in the base case scenario, $434.10 in the universal US screening arm, and $166.72 in the risk-based screening arm. Risk-based screening remained cost-effective until more than 14% of obese patients had risk factors and with a wide variation of US costs ($0-$1113). CONCLUSION Risk-based US screening in selected obese patients with risk factors for thyroid cancer is cost-effective. Recommendations for screening this subgroup will result in cost savings and a likely decreased morbidity and mortality in this subpopulation with more aggressive disease.
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Affiliation(s)
- Stephanie Cham
- Department of Surgery, Section of Endocrine Surgery, University of California, Los Angeles, Los Angeles, California
| | - Kyle Zanocco
- Department of Surgery, Feinberg School of Medicine, Northwestern University, Evanston, Illinois
| | - Cord Sturgeon
- Department of Surgery, Feinberg School of Medicine, Northwestern University, Evanston, Illinois
| | - Michael W. Yeh
- Department of Surgery, Section of Endocrine Surgery, University of California, Los Angeles, Los Angeles, California
| | - Avital Harari
- Department of Surgery, Section of Endocrine Surgery, University of California, Los Angeles, Los Angeles, California
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Yip L. Use of Molecular Markers for Cytologically Indeterminate Thyroid Nodules to Optimize Surgical Management. CURRENT SURGERY REPORTS 2013. [DOI: 10.1007/s40137-013-0035-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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