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Title: Comparison of prognostic scoring systems in follicular thyroid cancer
Authors: Teo K.W.
Yuan N.K. 
Tan W.B. 
Parameswaran R. 
Keywords: Cancer
Issue Date: 1-Jul-2017
Publisher: Royal College of Surgeons of England
Citation: Teo K.W., Yuan N.K., Tan W.B., Parameswaran R. (2017-07-01). Comparison of prognostic scoring systems in follicular thyroid cancer. Annals of the Royal College of Surgeons of England 99 (6) : 479-484. ScholarBank@NUS Repository.
Abstract: INTRODUCTION Many studies have addressed the accuracy of prognostic scoring systems in the treatment of differentiated thyroid cancers as a whole but few have addressed this issue in patients with follicular thyroid cancer (FTC) alone. The aim of this study was to establish the accuracy of the various scoring systems in determining the overall and disease free survival of FTC patients in Singapore. METHODS Retrospective review was undertaken of 82 patients with FTC treated at a single tertiary institution between January 2000 and December 2014. Demographic, clinical, pathological and treatment outcomes were analysed. Prognostic scoring systems evaluated for the cohort included TNM (Tumour, Nodes, Metastases), AGES (Age, Grade, Extent, Size), MACIS (Metastases, Age, Completeness of resection, Invasion, Size), AMES (Age, Metastases, Extent, Sex) and EORTC (European Organisation for Research and Treatment of Cancer). Statistical analysis was performed by plotting Kaplan-Meier survival curves and using the Cox proportional hazards model. RESULTS There were 29 male and 53 female patients with a mean age of 48 years. The mean follow-up duration was 88 months and there were 7 deaths (9%). The ten-year overall survival rate was 90%. Factors predictive of survival on univariate analysis were age, size of tumour, invasiveness, completeness of resection, metastasis, external beam radiotherapy, and risk scores using the AGES and MACIS scoring systems (p < 0.05). On multivariate analysis, AGES and MACIS provided the best prognostic information. CONCLUSIONS MACIS is the best prognostic scoring system currently available for FTC and it is superior to other scoring systems in term of guiding management. The scoring systems require further development to accommodate variations in clinical practice globally and to improve the prognostic accuracy.
Source Title: Annals of the Royal College of Surgeons of England
ISSN: 00358843
DOI: 10.1308/rcsann.2017.0072
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