primary intraosseous squamous cell carcinoma UMLS:C1709663 PIOSCC NCIT:C54295 EFO:1000492 MEDGEN:313618 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. GARD:0024390 MONDO:0006385 head and neck squamous cell carcinoma