Neoplasms which arise from or metastasize to the PITUITARY GLAND. The majority of pituitary neoplasms are adenomas, which are divided into non-secreting and secreting forms. Hormone producing forms are further classified by the type of hormone they secrete. Pituitary adenomas may also be characterized by their staining properties (see ADENOMA, BASOPHIL; ADENOMA, ACIDOPHIL; and ADENOMA, CHROMOPHOBE). Pituitary tumors may compress adjacent structures, including the HYPOTHALAMUS, several CRANIAL NERVES, and the OPTIC CHIASM. Chiasmal compression may result in bitemporal HEMIANOPSIA.

Synonyms: Carcinoma, Pituitary, Pituitary Adenomas, Cancer of the Pituitary, Pituitary Carcinomas, Pituitary Cancer, Cancer, Pituitary, Cancers, Pituitary, Pituitary Neoplasms, Pituitary Tumors, Tumor, Pituitary, Neoplasms, Pituitary, Neoplasm, Pituitary, Pituitary Tumor, Adenoma, Pituitary, Pituitary Neoplasm, Cancer of Pituitary, Adenomas, Pituitary, Pituitary Cancers, Pituitary Carcinoma, Pituitary Adenoma, Tumors, Pituitary, Carcinomas, Pituitary