title: Malignant inverted papilloma characterized by proptosis.
abstract: An inverted papilloma, presumably originating in the ethmoid sinus, was characterized by proptosis in a 67-year-old man. Clinically and radiologically it simulated a primary orbital tumor. Squamous carcinoma appeared in this lesion; irradiation and exenteration, 3 1/2 years after onset of symptoms, failed to prevent fatal intracranial extension.
mesh_terms: D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000473:pathology; D005094:Exophthalmos / Q000209:etiology*; D006801:Humans; D008297:Male; D009362:Neoplasm Metastasis; D009918:Orbital Neoplasms / Q000150:complications* / Q000473:pathology; D010212:Papilloma / Q000150:complications* / Q000473:pathology; D010255:Paranasal Sinus Neoplasms / Q000150:complications* / Q000473:pathology