K31: Other diseases of stomach and duodenum

K31.1: Adult hypertrophic pyloric stenosis

Adult hypertrophic pyloric stenosis is a medical condition affecting the stomach's outlet, known as the pylorus. This area, located between your stomach and small intestine, thickens due to an overgrowth of the muscle layer, causing a narrowing or blockage which interferes with food passing from the stomach into the intestine. This condition is not common in adults and is typically associated with infants. However, when it does occur in adults, it's often due to either a congenital condition the patient was born with or chronic inflammation caused by conditions such as peptic ulcers or gastritis. Symptoms can include vomiting, weight loss, upper abdominal discomfort, and feeling full early when eating. Without treatment, adult hypertrophic pyloric stenosis can lead to serious complications, such as malnutrition and dehydration.