Copyright © 2017 American Academy of Pediatrics. From: Prader-Willi Syndrome American Academy of Pediatrics Textbook of Pediatric Care, 2nd Edition, 2017 Figure Legend: (A) Facial features and (B) obesity in a male with Prader-Willi syndrome. (From Lyons MJ. Specific genetic conditions. In: Saul RA, ed. Medical Genetics in Pediatric Practice. Elk Grove Village, IL: American Academy of Pediatrics;2013:175–234.) Date of download: 12/19/2017 Copyright © 2017 American Academy of Pediatrics. All rights reserved.