Thyroid Gland Teratoma

**Semantic type:** Neoplastic Process

**Definition:** A teratoma that arises from the thyroid gland. Thyroid gland teratomas with high grade/malignant histological features carry DICER1 gene mutations and have been reclassified as thyroblastomas. They are no longer considered true teratomas.

**Synonyms:** - Primary Thyroid Gland Teratoma