BRAF and follicular thyroid adenoma: BRAF exon 15 was sequenced in 381 cases of thyroid lesions including Hashimoto ́s thyroiditis, nodular goiters, hyperplastic nodules, follicular adenomas (FA), papillary TC (PTC), follicular variant PTC (FVPTC), microcarcinomas of PTC (micro PTC; tumor size ≤ 1 cm), follicular TC (FTC), and non-well differentiated TC (non-WDTC).