Value of TIRADS, BSRTC and FNA-BRAF V600E mutation analysis in differentiating high-risk thyroid nodules

Sci Rep. 2015 Nov 24:5:16927. doi: 10.1038/srep16927.

Abstract

The thyroid imaging reporting and data system (TIRADS) and Bethesda system for reporting thyroid cytopathology (BSRTC) have been used for interpretation of ultrasound and fine-needle aspiration cytology (FNAC) results of thyroid nodules. BRAF(V600E) mutation analysis is a molecular tool in diagnosing thyroid carcinoma. Our objective was to compare the diagnostic value of these methods in differentiating high-risk thyroid nodules. Total 220 patients with high-risk thyroid nodules were recruited in this prospective study. They all underwent ultrasound, FNAC and BRAF(V600E) mutation analysis. The sensitivity and specificity of TIRADS were 73.1% and 88.4%. BSRTC had higher specificity (97.7%) and similar sensitivity (77.6%) compared with TIRADS. The sensitivity and specificity of BRAF(V600E) mutation (85.1%, 100%) were the highest. The combination of BSRTC and BRAF(V600E) mutation analysis significantly increased the efficiency, with 97.8% sensitivity, 97.7% specificity. In patients with BSRTC I-III, the mutation rate of BRAF(V600E) was 64.5% in nodules with TIRADS 4B compared with 8.4% in nodules with TIRADS 3 or 4A (P < 0.001). Our study indicated that combination of BSRTC and BRAF(V600E) mutation analysis bears a great value in differentiating high-risk thyroid nodules. The TIRADS is useful in selecting high-risk patients for FNAB and patients with BSRTC I-III for BRAF(V600E) mutation analysis.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Carcinoma, Papillary / diagnosis*
  • Carcinoma, Papillary / genetics
  • DNA Mutational Analysis
  • Diagnosis, Differential
  • Endoscopic Ultrasound-Guided Fine Needle Aspiration
  • Female
  • Humans
  • Male
  • Middle Aged
  • Mutation, Missense
  • Proto-Oncogene Proteins B-raf / genetics*
  • Risk
  • Thyroid Neoplasms / diagnosis*
  • Thyroid Neoplasms / genetics
  • Thyroid Nodule / diagnosis*
  • Thyroid Nodule / genetics

Substances

  • BRAF protein, human
  • Proto-Oncogene Proteins B-raf