title: Unusual cyst of the zygoma.
abstract: An unusual cyst of the zygoma is described. Three patterns of development of the cyst are suggested, namely: 1. Residual cyst of retained deciduous roots with metaplasia of the odontogenic epithelium into respiratory epithelium. 2. Fissural cyst of the zygomatico-maxillary suture. 3. Connection to the maxillary sinus, by a developmental exvagination or trauma to the sinus that caused entrapment of epithelium at the fracture line, with subsequent proliferation.
mesh_terms: D000368:Aged; D001845:Bone Cysts / Q000209:etiology / Q000473:pathology*; D006801:Humans; D008297:Male; D008443:Maxillary Sinus / Q000473:pathology; D015050:Zygoma / Q000473:pathology*