RT Book, Section A1 Chi, Andrew S. A2 Chabner, Bruce A. A2 Longo, Dan L. SR Print(0) ID 1127649867 T1 Primary Brain Tumors T2 Harrison's Manual of Oncology, 2e YR 2016 FD 2016 PB McGraw-Hill Education PP New York, NY SN 9780071793254 LK hemonc.mhmedical.com/content.aspx?aid=1127649867 RD 2024/04/20 AB Over 100 types of primary brain tumor are defined by the World Health Organization (WHO), the most commonly accepted classification system (1). Only a few entities account for the bulk of the incidence while the others are rare. The incidence rate of all primary central nervous system (CNS) tumors in the United States (U.S.) is 19.3 cases per 100,000 person-years (2). An estimated 64,530 primary CNS tumors were diagnosed in the United States in 2011. Approximately 24,070 of these tumors were malignant and this subgroup represented 1.46% of all malignant cancers diagnosed in the United States (2, 3).