Pyloric stenosis ultrasound
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Mohamadmostafa Jahansouz M.D.[2]
Overview
Ultrasonography demonstrates the thickened prepyloric antrum bridging the duodenal bulb and distended stomach and it is the modality of choice for the diagnosis of infantile pyloric stenosis.
Ultrasound
Ultrasonography is the modality of choice for the diagnosis of infantile pyloric stenosis.[1]
- Ultrasonography demonstrates the thickened pre-pyloric antrum bridging the duodenal bulb and distended stomach in patients with infantile pyloric stenosis.
- Demonstration of the pylorus is achieved by identifying the duodenal cap, distended stomach, and intervening pyloric channel.
- In patients with pyloric stenosis, the following findings may be observed on ultrasonography:
- Variable hypertrophy of the smooth muscle
- Intervening mucosa is crowded, thickened to a variable degree, and protrudes into the distended portion of the antrum nipple sign[2]
- Protruded mucosa may be seen filling the lumen on transverse sections.
- The target sign of infantile pyloric stenosis is a sign seen due to hypertrophied hypoechoic muscle surrounding echogenic mucosa. This is likened to that of a target.
(Images courtesy of RadsWiki)
References
- ↑ Costa Dias S, Swinson S, Torrão H, Gonçalves L, Kurochka S, Vaz CP; et al. (2012). "Hypertrophic pyloric stenosis: tips and tricks for ultrasound diagnosis". Insights Imaging. 3 (3): 247–50. doi:10.1007/s13244-012-0168-x. PMC 3369120. PMID 22696086.
- ↑ "Antral nipple sign | Radiology Reference Article | Radiopaedia.org".