(pituicytoma, benign) A benign neoplasm arising from the posterior lobe of the pituitary gland.

A solid, low grade, spindle cell, glial neoplasm of adults that originates in the neurohypophysis or infundibulum. Clinical signs and symptoms include visual disturbance, headache and features of hypopituitarism. Pituicytomas are well-circumscribed, solid masses that can measure up to several centimeters. Histologically, they show a compact architecture consisting of elongate, bipolar spindle cells arranged in interlacing fascicles or assuming a storiform pattern.

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.