RT Book, Section A1 Hay, Jr, William W. A1 Levin, Myron J. A1 Deterding, Robin R. A1 Abzug, Mark J. SR Print(0) ID 1145458386 T1 Rhabdomyosarcoma T2 Quick Medical Diagnosis & Treatment Pediatrics YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9781264257614 LK accesspediatrics.mhmedical.com/content.aspx?aid=1145458386 RD 2024/04/23 AB Most common soft tissue sarcoma occurring in childhoodAccounts for 10% of solid tumors in childhoodPeak incidence occurs at ages 2–5 years; diagnosed before age 10 in 70% of childrenMales are affected more commonly than femalesCan occur anywhere in the bodyClassified into subtypes based on pathologic featuresEmbryonal (60–80%), of which botryoid is a variantAlveolar (~15–20%)Undifferentiated sarcoma (8%)Pleomorphic, which is seen in adults (1%)Other (11%)