This tumor is thought to be derived from the parenchymal cells of the posterior lobe of the pituitary gland, called pituicytes.

Some researchers[1] believe that they arise from the folliculostellate cells in the anterior lobe of the pituitary.

It occurs in adults and symptoms include visual disturbance and endocrine dysfunction.

They are often mistaken for pituitary adenomas which have a similar presentation and occur in the same location.

[2] This article about an endocrine, nutritional, or metabolic disease is a stub.