A craniopharyngioma is a slow-growing, non-cancerous tumor that sits near the pituitary gland, right behind the eyes. Because it hugs hormone control centers and the optic nerves, it can quietly cause trouble for years before anyone notices. Watch for these common clues:

1. Vision changes
   Kids or adults may bump into doorframes, miss steps, or complain that the outer part of their sight picture is “missing.” The tumor presses on the nerves that carry images from the eyes to the brain.
2. Delayed or stunted growth
   Children may drop off their growth curve even though they eat normally. Adults can notice clothes fitting loosely or loss of muscle bulk.
3. Constant thirst and bathroom trips
   The tumor can knock out the hormone that tells kidneys to hold water, leading to gallons of diluted urine and an unquenchable need to drink.
4. Weight gain without extra food
   Metabolism slows, so pounds pile on even when appetite falls.
5. Morning headaches or vomiting
   Fluid buildup raises pressure inside the skull, especially on waking.
6. Fatigue and low drive
   Everyday tasks feel uphill; kids may lose interest in sports or school.
7. Late or absent puberty
   Girls may never start periods; boys may have no testicular growth.
8. Milk-like nipple discharge
   Hormone imbalance can trigger breast leakage in either sex.