Annular pancreas. Etiology, classification and diagnostic imaging.

Abstract:

:A rare type of annular pancreas, in which the tail of the annular duct is fused with the dorsal pancreatic duct to form the main duct, and its diagnostic imagings of endoscopic retrograde cholangiopancreatography, hypotonic duodenography, computed tomography and ultrasound are described. Annular pancreas is an anomaly embryologically formed by the ventral anlage of the pancreas as the duodenum rotates, mainly due to hypertrophy of the left ventral bud. According to the fusion pattern of the ventral and dorsal pancreatic ducts, annular pancreas can be divided into three types: type I, divisional annular pancreas; type II, branch annular pancreas; and type III, main duct annular pancreas. Endoscopic retrograde cholangiopancreatography, hypotonic duodenography, computed tomography and ultrasound can show the imagings of annular pancreas from different aspects, but the final diagnosis must be based on the evidence of endoscopic retrograde cholangiopancreatography or hypotonic duodenography combined with computed tomography or ultrasound.

journal_name

Chin Med J (Engl)

journal_title

Chinese medical journal

authors

Lin SZ

subject

Has Abstract

pub_date

1989-05-01 00:00:00

pages

368-72

issue

5

eissn

0366-6999

issn

2542-5641

journal_volume

102

pub_type

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