GH1 and pituitary gland adenoma: Of the 66 pituitary adenomas in the present study, 31 (47.0 %) were functioning adenomas [15 prolactinomas, five growth hormone (GH), one adrenocorticotrophic hormone (ACTH) adenoma, ten mixed adenomas], 35 (53.0 %) were non-functioning ademomas (26 null cell adenomas and 9 gonadotrophic adenomas).