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A gangliocytoma in the sellar region is very rare. We report a case of an intrasellar gangliocytoma complicated by pituitary adenoma presenting with acromegaly. A 52-year-old female was admitted to our hospital with headache, mild acromegaly, and bitemporal hemianopsia, and endocrinological study found a high serum level of growth hormone (GH). A computed tomographic scan revealed a tumor in the sellar region, which was almost totally removed by trans-sphenoidal surgery. Histological examination of the resected specimen showed diffuse, chromophobe-type pituitary adenoma, partially containing cholesterin clefts. Areas of clusters of dysmorphic neurons, adjacent to or mixed with pituitary adenoma, were diagnosed as gangliocytoma. The immunohistochemical examination showed GH-releasing hormone (GRH)-positive dysmorphic neurons and GH-positive pituitary adenoma. We consider that the trophic effect of GRH secreted by the neurons of GRH-producing intrasellar gangliocytoma probably caused the GH-producing pituitary adenoma.

Mixed Pituitary Adenoma and Gangliocytoma Associated with A cromegaly