A Case of Oncocytoma of Adenomhypophysis Discovered by a Head Injury

Adenohypophysis oncocytoma is a rare tumor of the pituitary region. In clinical and biological terms, the oncocytomas with fusiform cells are identical to other sellar tumors. We report a new case of oncocytoma of adenomhypophysis discovered by a head injury. The only diagnosis was confirmed by the presence of richly vascularized fusiform tumor cells whose cytoplasm is oncocyte and contains many mitochondria with no necrosis and some mitoses in anatomopathologic examination. The basic treatment is surgical excision by the endonasal endoscopic route. Radiotherapy and surgical revision are essential in the event of tumor recurrence.