RT Book, Section A1 Adams, Denise M. A1 Kelly, Michael E. A2 Rudolph, Colin D. A2 Rudolph, Abraham M. A2 Lister, George E. A2 First, Lewis R. A2 Gershon, Anne A. SR Print(0) ID 7043999 T1 Chapter 462. Vascular Neoplasms T2 Rudolph's Pediatrics, 22e YR 2011 FD 2011 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-149723-7 LK accesspediatrics.mhmedical.com/content.aspx?aid=7043999 RD 2024/04/23 AB Vascular tumors comprise a small percentage of tumors in children and adults. Classifying these tumors can be difficult because of the rarity of these lesions and their diverse morphologic appearance and clinical behavior. In the pediatric population, these tumors are not independently stratified, leading to further problems with diagnosis. The most common vascular tumors (hemangiomas) are benign and have a diverse spectrum of clinical phenotypes. Similarly, the rarer vascular tumors can be benign or malignant with some overlap adding to diagnostic and treatment dilemmas (Table 462-1).