Presentation
Persistent non-bilious vomiting
Patient Data
Age: 7 weeks
Gender: Male
From the case:
Hypertrophic pyloric stenosis
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Ultrasound of upper abdomen demonstrate:
-Significantly dilated stomach
-Marked muscular thickening of the pylorus which resembles target sign on transverse image
- It measures about 20.3mm in length and 5mm in single layer thickness
Features are compatible with hypertrophic pyloric stenosis
Case Discussion
Hypertrophic pyloric stenosis is the muscular thickening of the gastric pylorus resulting in gastric outlet obstruction.
The modality of choice for detection of this entity is using trans-abdominal ultrasonography by high-frequency linear probe.
The simple criteria for detection is abbreviated by "number pi"
π = 3.1415
- Pyloric muscle thickness, i.e. diameter of a single muscular wall on a transverse image >3 mm
- Pyloric transverse diameter ≥14 mm
- Length, i.e. longitudinal measurement >15 mm
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