Pituitary sarcoidosis.

A 66-year-old woman presenting with pituitary insufficiency was operated on for an intrasellar tumor. Surprisingly, this tumor, at first suspected to be a hormone-inactive pituitary adenoma, consisted in fact of sarcoid granulomatous tissue in the pituitary gland as found histologically. The morphological picture as seen in the cranial computed tomography was identical with that of an adenoma. This possibility had not previously been considered, although there had been an extracerebral manifestation of the sarcoidosis in the left ovary.