A narrowing of the outlet from the stomach to the small intestine (called the pylorus) that occurs in infants.
Review Date: 7/10/2015
Reviewed By: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.
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