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The influence of body mass index on the diagnostic performance of pre-operative staging ultrasound in papillary thyroid carcinoma

Authors
 Ji Soo Choi  ;  Hye Sun Lee  ;  Eun-Kyung Kim  ;  Hee Jung Moon  ;  Jin Young Kwak 
Citation
 Clinical Endocrinology, Vol.83(4) : 550-555, 2015 
Journal Title
 Clinical Endocrinology 
ISSN
 0300-0664 
Issue Date
2015
Abstract
OBJECTIVE: The aim of this study was to investigate the diagnostic performance of pre-operative staging ultrasound (US) according to body mass index (BMI) in patients with papillary thyroid carcinoma (PTC) PATIENTS AND METHODS: This retrospective study included 625 patients with PTC who underwent pre-operative staging US and surgical excision at a referral centre between December 2012 and April 2013. Four experienced radiologists prospectively evaluated the extent of primary tumours, multifocality and the presence of lymph node metastasis. Patients were grouped according to BMI (normal <25; overweight 25 ≤ and <30; obese ≥30, or nonobese <30; obese ≥30 kg/m(2) ). Diagnostic performances of pre-operative staging US (sensitivity, specificity, positive predictive value, negative predictive value and accuracy) were compared according to BMI based on pathologic findings of surgical specimens. RESULTS: Pre-operative staging US in the obese group (BMI ≥30 kg/m(2) ) showed a significantly lower negative predictive value and accuracy in the detection of central lymph node metastasis (P = 0·010 and P = 0·025, respectively) than in the nonobese (BMI <30 kg/m(2) ) group. However, there were no significant differences in the diagnostic performance of pre-operative staging US for extrathyroidal extension, bilateral multifocality and lateral lymph node metastasis in analyses using the two (nonobese vs obese) and three BMI (normal vs overweight vs obese) groups, respectively. CONCLUSION: Obesity (BMI ≥30 kg/m(2) ) may affect the pre-operative US staging of central lymph node metastasis in patients with PTC.
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/141146
DOI
10.1111/cen.12638
Appears in Collections:
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실)
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Yonsei Biomedical Research Center (연세의생명연구원)
Yonsei Authors
곽진영(Kwak, Jin Young) ; 김은경(Kim, Eun-Kyung) ; 문희정(Moon, Hee Jung) ; 이혜선(Lee, Hye Sun)
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Full Text
http://onlinelibrary.wiley.com/doi/10.1111/cen.12638/abstract
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