Imaging of Infantile Hypertrophic Pyloric Stenosis

Infantile hypertrophic pyloric stenosis (IHPS) is a developmental condition that typically manifests from 2–12 weeks of age, with the average infant presenting at 5 weeks [1, 2]. In these patients, gastric outlet obstruction is caused by abnormal muscular and mucosal thickening at the antro-pyloric junction of the stomach. Secondary to this obstruction, affected infants develop persistent, non-bilious, projectile vomiting that results in dehydration, weight loss, and electrolyte imbalances.