Understanding a Common Side Effect After Brain Tumor Surgery in Children

Researchers are studying a condition called cerebellar mutism syndrome, which can develop in some children after surgery for posterior fossa brain tumors (tumors in the back of the brain). This observational study will collect medical information, imaging scans, speech samples, and blood samples from children across Nordic countries before and after their surgery to understand why this complication happens, who is at risk, and how it progresses over time.

Up to 1 in 4 children who have surgery for posterior fossa brain tumors develop cerebellar mutism syndrome—a condition that causes loss of speech, weakness, poor coordination, and irritability. Doctors don't yet understand what causes this condition, who is most likely to develop it, or how best to treat it. This study aims to find answers by carefully tracking children's symptoms and brain imaging before and after their surgery.