Intrathyroid Thymic Carcinoma

**Semantic type:** Neoplastic Process

**Definition:** A rare primary carcinoma of the thyroid gland, composed of groups of carcinoma cells with thymic epithelial differentiation.

**Synonyms:** - CASTLE - CASTLE - CD5-Positive Thyroid Carcinoma - Intrathyroidal Carcinoma Showing Thymus-Like Elements - Thyroid Gland Carcinoma Showing Thymus-Like Differentiation