A squamous cell carcinoma that arises centrally from the jaw. It derives from odontogenic epithelial remnants. It includes solid type squamous cell carcinoma, squamous cell carcinoma that arises from an odontogenic cyst, and squamous cell carcinoma that derives from a keratocystic odontogenic tumor. The disease is MONDO_0006385 (primary intraosseous squamous cell carcinoma). Also known as: PIOSCC.