Overview
A narrowing of the outlet from the stomach to the small intestine (called the pylorus) that occurs in infants.
Review Date 8/5/2023
Updated by: Neil K. Kaneshiro, MD, MHA, Clinical Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.