A 3-week-old full-term male presents with forceful non-bilious projectile vomiting after every feed. He is ravenously hungry. Physical examination reveals mild dehydration and a palpable small olive-shaped mass in the epigastrium. What is the diagnosis?
Answer and explanation
Correct answer: D. Infantile hypertrophic pyloric stenosis
- Step 1: Non-bilious projectile vomiting in a 2 to 6-week-old infant with an 'olive' mass is pathognomonic for hypertrophic pyloric stenosis.
- Step 2: The pyloric sphincter muscle hypertrophies, obstructing gastric emptying.
- Step 3: Duodenal atresia and midgut volvulus typically present with bilious (green) vomiting.
Answer
Infantile hypertrophic pyloric stenosis.
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