Pyloric stenosis ultrasound: Difference between revisions
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==Overview== | ==Overview== | ||
[[Ultrasonography]] demonstrates the thickened prepyloric [[antrum]] bridging the [[duodenal bulb]] and distended [[stomach]] and it is the | [[Ultrasonography]] demonstrates the thickened prepyloric [[antrum]] bridging the [[duodenal bulb]] and distended [[stomach]] and it is the gold standard test for the [[diagnosis]] of infantile pyloric stenosis. | ||
==Ultrasound== | ==Ultrasound== | ||
*[[Ultrasonography]] demonstrates the thickened | *[[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. | *Demonstration of the pylorus is achieved by identifying the [[duodenal]] cap, distended [[stomach]], and intervening pyloric channel. | ||
*In patients with pyloric stenosis, the | *In patients with pyloric stenosis, the following findings may be observed on ultrasonography: | ||
*The length of the hypertrophied canal is variable and may range from as little as 14 mm to more than 20 mm. | **Variable [[Hypertrophy (medical)|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'''<ref name="urlAntral nipple sign | Radiology Reference Article | Radiopaedia.org">{{cite web |url=https://radiopaedia.org/articles/antral-nipple-sign |title=Antral nipple sign | Radiology Reference Article | Radiopaedia.org |format= |work= |accessdate=}}</ref> | |||
**Protruded [[mucosa]] may be seen filling the [[lumen]] on transverse sections | |||
**The length of the hypertrophied canal is variable and may range from as little as 14 mm to more than 20 mm. | |||
*The numeric value for the lower limit of [[muscle]] thickness has varied in reports in the literature, ranging between 3.0 and 4.5 mm. | *The numeric value for the lower limit of [[muscle]] thickness has varied in reports in the literature, ranging between 3.0 and 4.5 mm. | ||
*The actual numeric value is less important than the overall [[morphology]] of the canal and the real-time observations. | *The actual numeric value is less important than the overall [[morphology]] of the canal and the real-time observations. | ||
Revision as of 16:27, 6 December 2017
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Pyloric stenosis Microchapters |
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Pyloric stenosis ultrasound On the Web |
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American Roentgen Ray Society Images of Pyloric stenosis ultrasound |
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Risk calculators and risk factors for Pyloric stenosis ultrasound |
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 gold standard test for the diagnosis of infantile pyloric stenosis.
Ultrasound
- 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[1]
- Protruded mucosa may be seen filling the lumen on transverse sections
- The length of the hypertrophied canal is variable and may range from as little as 14 mm to more than 20 mm.
- The numeric value for the lower limit of muscle thickness has varied in reports in the literature, ranging between 3.0 and 4.5 mm.
- The actual numeric value is less important than the overall morphology of the canal and the real-time observations.
- 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)
