Coexistence of ectopic pituitary adenoma and empty sella in a patient with acromegaly : a case report and review of literature.

Ectopic pituitary adenoma with an empty sella is extremely rare. We report an unusual patient with an ectopic growth hormone-secreting pituitary adenoma in the sphenoid sinus with an empty sella. The association is related to a development disorder of the anterior pituitary tissues. Tumor in the sphenoid sinus was completely removed by endoscopic endonasal transsphenoidal approach. During the follow-up, the patient met the criteria for endocrinological cure.