The incidence of brain tumors is unusual in comparison with other neoplasms because there is a definite decline among the aged, as shown in Fig. 18.1. Brain tumors particularly those in the cerebellum, are relatively common in childhood. Incidence remains fairly constant until the sixties, when there is a steady decline, with the incidence being quite low in the very elderly. The male-to-female ratio is nearly one except for meningiomas, which are about twice as common in women is in men. As the causes of brain tumors are not known, there is no explanation for the unusual incidence patterns. Several good review articles addressing brain tumors in the elderly have been published in the past decade (Tomita and Raimondi 1981; Cooney and Solitare 1972).
KeywordsCorticosteroid Meningioma Lomustine
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