Adenoma recurrences were established in 24 (9.7%) of 247 patients with operated pituitary adenomas; 7 of them were with chromophobic non-secreting adenomas, 9 patients with acromegaly, 5 female and 3 male patients were with prolactinomas. Transcranial operations were performed on patients with large-size tumors and transsphenoidal ones on patients with small-size adenomas. Our experience has shown that adenoma recurrence was more frequent in larger tumors. Our results are supported by those of other authors. Early diagnosis and surgical treatment of pituitary adenomas prevent their recurrences.