Craniopharyngiomas occur in the sellar region of the brain, near the pituitary gland. They occur most often after the age of 50 years, but can be present at birth. They represent less than 1% of primary brain tumors in adults.
Craniopharyngiomas can press on vital brain tissue and cause symptoms to appear. The tumors can also block fluid in the brain and cause swelling. The prognosis is good for craniopharyngiomas that are completely removed in radiosurgery.