title: When is medullary thyroid carcinoma "medullary thyroid carcinoma"?
mesh_terms: D000328:Adult; D000368:Aged; D002277:Carcinoma / Q000145:classification / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013964:Thyroid Neoplasms / Q000145:classification / Q000473:pathology*