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Introduction Central nervous system (CNS) tumors comprise 2% to 5% of all tumors. 80% involve the brain and 20% involve the spinal cord. Brain tumors cause approximately 2% of all cancer deaths. 60% to 80% of brains tumors are primary and rest 20% to 40% are metastatic. 1 Tumors of the CNS account for as many as 20% of all cancers of childhood and are second only to leukaemia as a cause of death from malignancy. In childhood 70% of primary brain tumors are infratenorial and involve cerebellum, midbrain, pons and medulla. 2doi:10.3329/bsmmuj.v3i2.7054 fatcat:76xnufpu3na7tdcsgpvxnh3i74