label: Pituicytoma
label_lc: pituicytoma
description: An extremely rare, WHO grade 1, circumscribed and slow-growing tumor that arises from the neurohypophysis or infundibulum and described in adults.  It is characterized by the presence of elongated, spindle-shaped neoplastic glial cells that form storiform patterns or interlacing fascicular arrangements.  Signs and symptoms include visual disturbances, headache, amenorrhea, and decreased libido.