Duplication duodenum

Partial duodenal obstruction may be produced by duodenal stenosis, duodenal web, Ladd s bands, midgut volvulus, annular pancreas, preduodenal portal vein, and duplication cyst. Plain radiographs show gaseous distension of the stomach and duodenum with a normal or diminished quantity of air in the small bowel. Content studies may be necessary to differentiate between midgut volvulus and partial duodenal obstruction caused by a web or stenosis (Auringer and Sumner 1994). Sonography is helpful to rule out extraluminal causes such as a duplication cyst. 

Fig. 5.15. a A non-communicating duplication cyst of duodenum. Note the echogenic mucosal layer and hypoechoic muscular layer and the inhomogeneous content of the cyst, b Colonic duplication. US demonstrates mucosal echogenic stripe ( rroivs). c (1) (11) CT of colon duplication... 

Fig. 5.17a,b. Duodenal duplication cyst a Barium study showing a relatively smooth impression arising from the medial wall of the descending duodenum extending around the inferior duodenal flexure, b CT of the same patient confirms the fluid nature of the cyst... 

Fig. 9.4. Duodenal duplication. CECT shows a cystic structure in the medial portion of the descending duodenum. This is narrowing and displacing its lumen...

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