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  • Title: Associations of the BRAF(V600E) mutation with sonographic features and clinicopathologic characteristics in a large population with conventional papillary thyroid carcinoma.
    Author: Park AY, Son EJ, Kim JA, Youk JH, Park YJ, Park CS, Chang HS.
    Journal: PLoS One; 2014; 9(10):e110868. PubMed ID: 25337709.
    Abstract:
    OBJECTIVE: To evaluate the association of the BRAF(V600E) mutation with sonographic features and clinicopathologic characteristics in a large population with conventional papillary thyroid carcinoma (PTC). METHODS: We retrospectively reviewed the sonographic features, clinicopathologic characteristics, and presence of the BRAF(V600E) mutation in 688 patients who underwent thyroidectomy for conventional PTC between January and July 2010 at a single institution. The incidence of the BRAF(V600E) mutation was calculated. The sonographic features and clinicopathologic characteristics were compared between BRAF-positive and BRAF-negative patients. BRAF-positive patients were subdivided into those with papillary thyroid microcarcinoma (the PTMC group) and those with PTC larger than 10 mm (the PTC>10 mm group), and their sonographic features were compared. RESULTS: The BRAF(V600E) mutation was detected in 69.2% of patients (476 of 688). Sonographic features were not significantly different between BRAF-positive and BRAF-negative PTC, nor between PTMC and PTC>10 mm groups. The BRAF(V600E) mutation was associated with male sex (P = 0.028), large tumor size, extrathyroidal extension, central and lateral lymph node metastasis, and advanced tumor stage (P<0.0001). CONCLUSION: The BRAF(V600E)mutation was significantly associated with several poor clinicopathologic characteristics, but was not associated with sonographic features, regardless of tumor size. We recommend that patients with a thyroid nodule with any suspicious sonographic feature undergo preoperative BRAF(V600E) testing for risk stratification and to guide the initial surgical approach in PTC.
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