Rapid Review: Pyloric Stenosis - RoshReview.com

Rapid Review: Pyloric Stenosis

October 2, 2017

Reviewed March 2024

Pyloric Stenosis

  • 28 weeks of age, boys > girls
  • Nonbilious projectile vomiting after feeding, early satiety
  • Clinical: dehydration, RUQ olive-like mass 
  • Labs: hypochloremic hypokalemic metabolic alkalosis
  • Dx: ultrasound or UGI series (string sign)
  • Tx: surgery, fluid & electrolyte replacement

Sample question:

A 3-week-old boy presents with two days of nonbilious projectile vomiting. Examination reveals a mass in the infant’s right upper quadrant. On a barium upper GI series report, the radiologist states a string sign is present. Which of the following is this infant at greatest risk of developing?

By Yehuda Wolf, MPA, PA-C

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