Читать книгу Clinical Pancreatology for Practising Gastroenterologists and Surgeons - Группа авторов - Страница 43

This is a rare congenital anomaly due to failure of rotation of the ventral bud. This results in a band of pancreatic tissue encircling the second part of the duodenum. It may cause AP but the association is weak. Annular pancreas generally remains asymptomatic in adults. In a retrospective series of 198 patients (mean age 55.1 ± 18.3 years) with radiologically and/or surgically confirmed annular pancreas, 60% of patients were asymptomatic. Among symptomatic patients, only 16% had AP (i.e. about 7% of adult patients with annular pancreas presented with AP) [68].