Hypertrophic Pyloric Stenosis

  • Michael W. Dingeldein


Nonbilious projectile emesis between weeks of life 2–5 with hypochloremic, hypokalemic metabolic alkalosis is the cardinal feature of hypertrophic pyloric stenosis (HPS). The vomiting often happens soon after feeding, with the child continuing to act hungry and appearing vigorous without fevers. The health of the child at presentation can vary widely due to hydration status, from well appearing to lethargic and severely dehydrated. Not uncommonly, children present with HPS relatively late in the disease course after changes in feedings or formulas have been made with the thought that the emesis was secondary to feed intolerance or reflux.


Food Allergy Hydration Status Gastric Outlet Obstruction Cardinal Feature Hypertrophic Pyloric Stenosis 
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Copyright information

© Springer New York 2015

Authors and Affiliations

  • Michael W. Dingeldein
    • 1
  1. 1.Department of Pediatric SurgeryThe Children’s Hospital at the University of Oklahoma Medical CenterOklahoma CityUSA

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