Pyloric stenosis is narrowing of the opening from the stomach to the duodenum, the first part of the small intestine. Narrowing prevents food from passing freely between the 2 structures. Pyloric stenosis affects your baby's ability to get adequate nutrition and hydration. The sooner your baby is treated, the better the outcomes.

Pyloric Stenosis
si55551273_96472_1
Copyright © Nucleus Medical Media, Inc.

The narrowing is caused by an enlarged muscle surrounding the pylorus. The exact cause of the enlarged muscle is unknown. It is believed to be the result of several factors, which may include:

  • Genetics
  • Structural defects that occur during fetal development
  • Bacterial infection, such as Helicobacter pylori