title: Annular pancreas: a new classification and clinical observations.
abstract: Seven cases of annular pancreas are described. In all the diagnosis was confirmed at autopsy or at operation. This study provides a new, original classification for annular pancreas. Two distinct subtypes are described: type 1, extramural and type 2, intramural. In type 1 the presenting symptoms are those of high gastrointestinal obstruction. In type 2 the symptoms are those of duodenal ulceration. For extramural obstructing annuli surgical intervention, if indicated, should be a bypass procedure; for intramural types with duodenal ulcer, subtotal gastrectomy with or without vagotomy is the procedure of choice.
mesh_terms: D000368:Aged; D002965:Classification; D004381:Duodenal Ulcer / Q000209:etiology; D005767:Gastrointestinal Diseases / Q000209:etiology; D006801:Humans; D007231:Infant, Newborn; D008875:Middle Aged; D010179:Pancreas / Q000002:abnormalities* / Q000473:pathology