Infant Vomiting & An Abdominal Clue

A 23-day-old male presents with increasing vomiting, dehydration, and a palpable abdominal mass. Explore this classic Pediatric Emergency case.

Pyloric stenosis


A 23-day-old male infant was brought to the emergency department after 5 days of increasing vomiting. Physical exam revealed mild dehydration and an olive-sized abdominal mass. Upper gastrointestinal radiography showed a distended, air-filled stomach. What is the likely diagnosis?

What is the most likely diagnosis?

Gastric duplication
Pyloric stenosis
Duodenal atresia
Intestinal malrotation
Mid-gut volvulus

Caterpillar Sign, Infant Vomiting, Olive-like Mass, Pediatrics, Pyloric stenosis

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