甲状腺髓样癌来源于分泌降钙素的滤泡旁细胞(C细胞),又称甲状腺C细胞癌,约占甲状腺癌的5%～10%。临床上有散发性和家族性两种类型,前者常见,呈单发结节,一般无明显症状,部分患者伴顽固性腹泻;家族性约占10%～20%,其发病年龄低于散发性,多为青年及儿童,属常染色体 Medullary thyroid carcinoma from the secretion of calcitonin next to follicular cells (C cells), also known as thyroid C-cell carcinoma, accounting for about 5% to 10% of thyroid cancer. Clinically sporadic and familial two types, the former common, was single nodules, usually no obvious symptoms, some patients with intractable diarrhea; familial accounts for about 10% to 20%, the age of onset is lower than the sporadic , Mostly young people and children, are autosomal