Multicenter Registry for Patients With Childhood.Onset Craniopharyngioma, Xanthogranuloma, Cysts of Rathke's Pouch, Meningioma, Pituitary Adenoma, Arachnoid Cysts

This is an international registry collecting long-term data on children and teenagers who have been diagnosed with rare brain and pituitary tumors, including craniopharyngioma, pituitary adenoma, meningioma, Rathke's cleft cysts, and arachnoid cysts. The registry helps researchers understand how these conditions progress over time and which treatments work best. **You may be eligible if...** - You were diagnosed with craniopharyngioma for the first time - You were 18 years old or younger at the time of diagnosis - A parent, legal guardian, and/or the patient has agreed to participate **You may NOT be eligible if...** - You were older than 18 at the time of diagnosis - Your diagnosis is something other than craniopharyngioma Talk to your doctor to see if this trial is right for you.