Brain Tumors

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Abstract
THE study of brain tumors is especially rewarding today: molecular biology has provided new insights into pathogenesis, neurosurgical technology has increased the capacity for tumor removal, and promising new nonsurgical therapies are being developed. This report will review the contemporary understanding of intracranial tumors, primarily in adults, emphasizing developments within the past five years.Epidemiology and PathogenesisNew brain tumors develop in approximately 35,000 adult Americans each year.1 , 2 These can be divided into primary tumors (those arising from the brain and its coverings) and metastatic tumors (those arising elsewhere in the body). Table 1 presents a list of the most clinically important . . .