Adult Pyloric Stenosis

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Definition

Pyloric stenosis is a narrowing of the pylorus, the opening from the stomach into the small intestine.


Alternative Names

Congenital hypertrophic pyloric stenosis; Hypertrophic pyloric stenosis; Gastric outlet obstruction


Causes, incidence, and risk factors

Normally, food passes easily from the stomach into the duodenum (the first part of the small intestine) through a valve called the pylorus. In pyloric stenosis, the muscles of the pylorus are thickened. This thickening prevents the...

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