Double pituitary adenoma associated with acromegaly and hyperprolactinemia: a case report

Doubleor multiple adenomas are rare, and synchronous secretory pituitary adenomas are rarer still. We report a case of a 30-year-old woman with a 6-year history of amenorrhea and occasional galactorrhoea. She presented with headaches, weight gain, subtle acromegalic features, new-onset hypertension and diabetes. Workup confirmed acromegaly and hyperprolactinemia. Preoperative magnetic resonance imaging of the pituitary demonstrated two noncontiguous microadenomas. Two distinct tumors were resected through a transsphenoidal approach. Immunohistochemical analysis of each separated adenoma confirmed the diagnosis of acromegaly and prolactinoma. Postoperatively, she was cured of acromegaly, and her amenorrhea/galactorrhea syndrome resolved. Her growth hormone and insulin-like growth factor-I levels normalized, whereas her prolactin level remained slightly above normal. Therefore, it is critical to consider double or multiple adenomas preoperatively through careful endocrine assessment and review of magnetic resonance imaging. As shown in our case, careful evaluation led to a better surgical outcome.