70s, the rules of
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70s, the rules ofA mnemonic for CNS tumors
70s, rule of
General 70% are primary CNS neoplasms, 70% of primary CNS neoplasms are glial, 70% of primary glial tumors are astrocytomas; 70% of astrocytomas are high grade
Children 70% of tumors arise in the posterior fossa, 70% of those occurring before age 2 are medulloblastomas; 70% of supratentorial tumors are craniopharyngiomas
Adults 70% are in the hemispheres, 70% of those in the pineal region are germinomas, 70% of those in the pituitary gland are adenomas, of which 70% are chromophobe adenomas