Imaging Approach to the Duodenum

Published on 19/07/2015 by admin

Filed under Radiology

Last modified 19/07/2015

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(Left) The duodenum is retroperitoneal, except for the bulb (1st portion) image. The 3rd portion of duodenum crosses in front of the aorta and behind the superior mesenteric vessels image.

(Right) The 2nd portion of duodenum is attached to the pancreatic head and lies in close proximity to the right renal hilum. The ampulla of Vater image lies along the medial wall of the 2nd duodenum. The hepatoduodenal ligament image attaches the duodenum to the porta hepatic and contains the bile duct, portal vein, and hepatic artery.
(Left) Spot film from an upper GI series shows a typical diverticulum image extending from the medial border of the 2nd portion of the duodenum.

(Right) Axial CT in the same patient shows an air-fluid level within the duodenal diverticulum image. A completely fluid-filled diverticulum may mimic a cystic mass in the head of the pancreas.

(Left) Film from an upper GI series in a patient with SMA syndrome shows the straight line demarcation image of the midline duodenum, with dilation of the upstream duodenal lumen image. The remainder of the small bowel is normal.

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