EFO_1001957 (hereditary thyroid gland medullary carcinoma) is a medullary thyroid gland carcinoma inherited through an autosomal dominant mode. It is associated with multiple endocrine neoplasia type II (2a) or III (2b). Also known as: Familial Thyroid Gland Medullary Carcinoma, Hereditary Thyroid Gland Medullary Cancer, familial medullary thyroid cancer.