Distribution of gene mutations and fusion transcripts in adult and pediatric thyroid lesions positive by molecular testing. The graph shows the relative proportion of each gene alteration in molecular-positive classical variant of papillary carcinoma (cPTC), follicular variant of papillary carcinomas (fvPTC), follicular thyroid carcinomas (FTC), and follicular adenomas (FA) based on Table 2 for pediatric cases and Supplementary Table S3 for adult cases. The differences between pediatrics and adults for BRAF, RAS, RET/PTC, or PAX8/PPARG proportions were not statistically significant (p > 0.05).