Pyloric stenosis ultrasound
|
Pyloric stenosis Microchapters |
|
Diagnosis |
|---|
|
Treatment |
|
Case Studies |
|
Pyloric stenosis ultrasound On the Web |
|
American Roentgen Ray Society Images of Pyloric stenosis ultrasound |
|
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)
