(A) An ultrasound image of an infant with pyloric stenosis (A) An ultrasound image of an infant with pyloric stenosis. Note the hypertrophied pylorus (longitudinal view) adjacent to the anechoic, fluid-filled stomach. Note the increased muscle wall thickness, as well as the lengthened pyloric channel. (B) Ultrasound image of a different patient with pyloric stenosis. Note the distended stomach. Also note the redundant gastric mucosa protruding into the antral stomach. (Photo contributor: Jennifer Chao, MD.) Source: Chapter 21. Emergency Ultrasound, Atlas of Pediatric Emergency Medicine, 2e Citation: Shah BR, Lucchesi M, Amodio J, Silverberg M. Atlas of Pediatric Emergency Medicine, 2e; 2013 Available at: http://accessemergencymedicine.mhmedical.com/DownloadImage.aspx?image=/data/Books/shah2/shah2_c021f009a.png&sec=42538168&BookID=577&ChapterSecID=42532507&imagename= Accessed: December 19, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved