Medulloblastoma is a primary central nervous tumour with malignant potential which begins in brain or spinal cord. It is the second most common brain tumour in Children accounting for 20% of cases. It can occur in any age, but most often occur in young children. It is found rare in adult group. It is primarily a cerebellar tumour and as cerebellum is mainly involved in muscle co-ordination, balance and movement hence this tumour symptoms include–headache, nausea, vomiting, dizziness, tiredness, Double Vision, Poor Co-Ordination and unsteady Walk. Treatment Includes Surgery, Chemotherapy And Radiotherapy.