Hypertrophic pyloric stenosis
Patient presented with projectile vomiting from the 1st week of birth. No weight gain.
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Longitudinal view showing hypoechoic ring of hypertrophied pyloric muscle around echogenic mucosa centrally: "target sign".
Oblique view shows elongated pyloric canal measuring 17 mm with pyloric muscle wall thickness of 4 mm.
The stomach appears dilated.
- Radiology review manual