Congenital stenosis of the first part of the duodenum in an adolescent.
D000293:Adolescent; D003250:Constriction; D004386:Duodenum / Q000002:abnormalities* / Q000473:pathology; D005260:Female; D005743:Gastrectomy; D006801:Humans; D010437:Peptic Ulcer / Q000150:complications; D011708:Pylorus / Q000473:pathology