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Additional BRAF mutation analysis may have additional diagnostic value in thyroid nodules with ‘‘suspicious for malignant’’ cytology alone even when the nodules do not show suspicious US features

Authors
 Jae Young Seo  ;  Eun-Kyung Kim  ;  Jin Young Kwak 
Citation
 ENDOCRINE, Vol.47(1) : 283-289, 2014 
Journal Title
ENDOCRINE
ISSN
 1355-008X 
Issue Date
2014
MeSH
Adolescent ; Adult ; Aged ; Aged, 80 and over ; Child ; DNA Mutational Analysis* ; Diagnosis, Differential ; Endoscopic Ultrasound-Guided Fine Needle Aspiration ; Female ; Humans ; Male ; Middle Aged ; Mutation ; Predictive Value of Tests ; Prognosis ; Proto-Oncogene Proteins B-raf/genetics* ; Thyroid Neoplasms/diagnostic imaging* ; Thyroid Neoplasms/genetics ; Thyroid Neoplasms/pathology* ; Thyroid Nodule/diagnostic imaging* ; Thyroid Nodule/genetics ; Thyroid Nodule/pathology* ; Young Adult
Keywords
Papillary thyroid cancer ; Diagnosis ; US ; FNA ; BRAF mutation
Abstract
The BRAFV600E mutation test has been more effective in thyroid nodules with suspicious US features than ones without suspicious features. Therefore, we investigated the role of the BRAFV600E mutation as an additional study to cytology in diagnosing a thyroid nodule without suspicious US features. This study was performed at Severance hospital from December 2010 through February 2012. During this period, 2,650 patients with 2,918 nodules underwent FNA with an additional BRAFV600E mutation test. Among them, we excluded thyroid nodules with suspicious US features. Finally, 485 thyroid nodules in 466 patients (mean age 50.3 years; range 9–80 years) were included in this study. We compared the differences between patients with malignant and benign thyroid nodules. We evaluated the detection rates of the BRAFV600E mutation according to the Bethesda System for Reporting Thyroid Cytopathology (BSRTC). There were 60 (60/485, 12.4 %) malignant and 425 (425/485, 87.6 %) benign nodules. The detection rate of the BRAFV600E mutation in thyroid nodules without suspicious US features was only 6.6 % (32/485). Most had malignant cytology (62.5 %, 20/32). For nodules without malignant cytology, only 12 nodules (2.6 %, 12/462) had the BRAF mutation. Among the 12 nodules, nine nodules were suspicious for malignancy on cytology. Additional BRAF mutation analysis shows additional diagnostic value in thyroid nodules with “suspicious for malignant” cytology alone even when the nodules do not show suspicious US features. Therefore, the test should be selectively performed in thyroid nodules without suspicious US features, considering cost-effectiveness as well as diagnostic accuracy.
Full Text
http://link.springer.com/article/10.1007%2Fs12020-013-0150-5
DOI
10.1007/s12020-013-0150-5
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
Yonsei Authors
Kwak, Jin Young(곽진영) ORCID logo https://orcid.org/0000-0002-6212-1495
Kim, Eun-Kyung(김은경) ORCID logo https://orcid.org/0000-0002-3368-5013
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/99601
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