A 5-week-old boy has progressive non-bilious projectile vomiting after feeds. He remains hungry, has lost weight, and examination shows dehydration.

Question

A 5-week-old boy has progressive non-bilious projectile vomiting after feeds. He remains hungry, has lost weight, and examination shows dehydration. Labs show pH 7.55, chloride 82 mmol/L, potassium 2.9 mmol/L, and bicarbonate 38 mmol/L. What is the most likely diagnosis?

Accepted Answer

Hypertrophic pyloric stenosis

Answer

Gastro-oesophageal reflux

Answer

Malrotation with volvulus

Answer

Milk protein allergy

Answer

Viral gastroenteritis

Hypertrophic pyloric stenosis — RCPSC EM MCQ

A 5-week-old boy has progressive non-bilious projectile vomiting after feeds. He remains hungry, has lost weight, and examination shows dehydration. Labs show pH 7.55, chloride 82 mmol/L, potassium 2.9 mmol/L, and bicarbonate 38 mmol/L. What is the most likely diagnosis?