Question

A 4-month-old infant with projectile vomiting and a palpable 'olive' in the epigastrium is suspected of hypertrophic pyloric stenosis. Which diagnostic test is first-line?

Accepted Answer

Abdominal ultrasound

Answer

Upper GI endoscopy

Answer

Abdominal X-ray

Answer

Barium swallow

Answer

24-hour pH study

Practice question

A 4-month-old infant with projectile vomiting and a palpable 'olive' in the epigastrium is suspected of hypertrophic pyloric stenosis. Which diagnostic test is first-line?