Thyroid Gland Mixed Medullary and Follicular Carcinoma

**Semantic type:** Neoplastic Process

**Definition:** A primary carcinoma of the thyroid gland containing a medullary carcinoma component that is immunohistochemically positive for calcitonin, and follicular carcinoma component that is immunohistochemically positive for thyroglobulin.

**Synonyms:** - MMFTC - Mixed Medullary and Follicular Thyroid Carcinoma - Mixed medullary-follicular carcinoma