paediatrics Brussels 17

Medulloblastoma - demographics

• Commonest pediatric malignant brain tumor • 15-20% of all pediatric brain tumors • 80% <15 years old, 20% <2 years old • 40% of pediatric posterior fossa tumors • Slightly more common in boys • Mean age at diagnosis – 7yrs; peaks at 1-5 yrs and 6-9yrs