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- causes gastric outlet obstruction and vomiting
- 1 in every 500 infants; with a 4:1 male-to-female ratio and a family history in another sibling
- symptoms begin 2-4 weeks after birth, with projectile NON-bilious vomiting
- firm, mobile, nontender, olive-shaped mass in right hypochondrium or epigastric area
- diagnosis confirmed with US or upper GI series
- treatment is a pyloromyotomy, but fluid and electrolyte replacement is vital in ED
References
NMS Pediatrics