DUSP5 mRNA levels were 7.9 fold higher in BRAF-mutated papillary thyroid carcinoma (PTC) than in normal adjacent tissue (P = 6.3.10−58) and 1.5 fold higher in RAS-mutated PTC than in normal adjacent tissue (P = 8.10−3). This evidence concerns the gene BRAF and differentiated thyroid carcinoma.