Craniopharyngioma is a rare type of noncancerous brain tumor.
Craniopharyngioma begins as a growth of cells near the brain's pituitary gland. The pituitary gland makes hormones that control many body functions. As a craniopharyngioma slowly grows, it can affect the pituitary gland and other nearby structures in the brain.
Craniopharyngioma can happen at any age, but it occurs most often in children and older adults. Symptoms include changes in vision over time, fatigue, headaches and urinating more often. Children with craniopharyngioma may grow slowly and may be smaller than expected.