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Antral Polyp

Case Detail

Anatomy: Gastrointestinal
Joseph Junewick, MD FACR
Diagnostic Category: Neoplasia Benign
Created: over 11 years ago
Updated: over 10 years ago
Tags: PEDS
Modality/Study Types: US
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4 month old male with progressive vomiting now with hemetemesis.

Case Images


Hyperplastic antral polyp and pyloric stenosis.


UGI – elongated pyloric channel with tram track, pyloric muscle indentation upon the antrum of the stomach, subtle polypoid filling defect at antro-pyloric junction.

US – asymmetrically thickened pyloric muscle with polypoid lesion emanating into the prepyloric antrum.


Pyloric mucosal hyperplasia is a known component of hypertrophic pyloric stenosis and may be related to hypergastrinemia or prostaglandins. Hyperplastic mucosal polyps may be related to prolonged gastric outlet obstruction, enteric hormone effect and/or peptic effect.


Kim S, et al. Coexisting hypertrophic antral polyp and hypertrophic pyloric stenosis. Ped Radiol 1997; 27:912-914.

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