Primary Intraosseous Carcinoma, Not Otherwise Specified

**Semantic type:** Neoplastic Process

**Definition:** A rare carcinoma that arises centrally from the jaw and cannot be categorized as any other type of carcinoma. It derives from odontogenic cysts, odontogenic epithelial remnants, or other benign precursors.

**Synonyms:** - PIOC - Primary Intraosseous Carcinoma, NOS - Primary Intraosseous Squamous Cell Carcinoma