Munson Health
Pyloric Stenosis

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by Smith N

(Infantile Hypertrophic Pyloric Stenosis)


Risk Factors

The following factors increase your baby’s chance of developing pyloric stenosis. If your child has any of these risk factors, tell your doctor.
  • Prematurity
  • Family history of pyloric stenosis
  • Bottle feeding
  • More common in male babies (particularly first-born males)
  • More common in Caucasian than in Latino, Asian, or African-American babies


Symptoms of pyloric stenosis usually begin when babies are 3-5 weeks old. They include:


Pyloric stenosis is treated with a surgery called a pyloroplasty , with your baby asleep under anesthesia. In a pyloroplasty, the outside of the pylorus muscle is cut to relieve the blockage. Prior to surgery, fluids and electrolytes will be given intravenously to correct the dehydration and electrolyte imbalances that are common in babies with pyloric stenosis. After the operation, fluids are given by vein until the baby can take all of his normal feedings by mouth.


American Association of Pediatrics

The American Pediatric Surgical Association



Caring for Kids
The Canadian Paediatric Society

Health Canada



Hernanz-Schulman M. Infantile hypertrophic pyloric stenosis. Isr Med Assoc J . 2004;6:160-161.

Kim SS, Lau ST, Lee SL, et al. Pyloromyotomy: a comparison of laparoscopic, circumumbilical, and right upper quadrant operative techniques. J Am Coll Surg . 2005;201:66-70.

Pisacane A, de Luca U, Criscuolo L, et al. Breastfeeding and hypertrophic pyloric stenosis: population-based case-control study. BMJ . 1996;312:745-746.

White JS, Clements WD, Heggarty P, et al. Treatment of infantile hypertrophic pyloric stenosis in a district general hospital: a review of 160 cases. J Pediatr Surg . 2003;38:1333-1336.

11/4/2013 DynaMed's Systematic Literature Surveillance. Available at: : McAteer JP, Ledbetter DJ, et al. Role of bottle feeding in the etiology of hypertrophic pyloric stenosis. JAMA Pediatr. 2013 Oct 21.


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