70s, the rules of

70s, the rules of

A 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