Multiple Endocrine Neoplasia Type 2A

**Semantic type:** Neoplastic Process

**Definition:** Multiple endocrine neoplasia caused by mutation of the RET gene. Patients develop medullary thyroid carcinomas, and may also develop pheochromocytomas and parathyroid gland hyperplasia.

**Synonyms:** - MEA Type 2a - MEA Type II - MEN 2A - MEN Type 2a - MEN Type II - Multiple Endocrine Adenomatosis Type 2A - Multiple Endocrine Adenomatosis Type 2a - Multiple Endocrine Adenomatosis Type II - Multiple Endocrine Adenomatosis, Type II - Multiple Endocrine Neoplasia Type 2a - Multiple Endocrine Neoplasia Type II - Multiple Endocrine Neoplasia, Type II - Multiple endocrine neoplasia [MEN] type IIA