Source:http://linkedlifedata.com/resource/umls/id/C0700639
NCI: An abnormality characterized by thickening of the muscle in the wall of the pylorus. It results in the narrowing of the pyloric channel. The overlying mucosa may appear hypertrophic as well. Clinical signs and symptoms appear early in life and include projectile vomiting and dehydration.,MSH: Narrowing of the pyloric canal due to HYPERTROPHY of the surrounding circular muscle. It is usually seen in infants or young children.