Pronounced: Py-loric sten-OH-sisEn Español (Spanish Version)
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.
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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:
- Structural defects that occur during fetal development
- Bacterial infection, such as Helicobacter pylori
Last reviewedAugust 2014by Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.