Duodenal duplication

Duodenal duplication and diverticula are rare and incidentally cause a duodenal stenosis. A cystic non-communicating duplication is easy to detect sonographically while a communicating duplication... 

Fig. 2.40a-e. Duodenal Duplication Cyst. Endoscopy (a,b) demonstrates a smooth submucosal mass extending caudally from the major papilla, covered with normal mucosa. Note the normal papilla (a). Endoscopic- ultrasound (c) confirms the cystic nature of the lesion. The resection specimen (d) shows the intraluminal component of the cyst and histopathology (e) the inner- and outer epithelial lining of the duodenal duplication cyst... 

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... 

Leenders EL, Osman MZ et al (1970) Treatment of duodenal duplication with international review. Am Surg 36(6) 368-371... 

Intestinal Malrotation 168 Duodenal Diverticulum 169 Duodenal Duplication 169 Preduodenal Portal Vein 170 Inflammatory Diseases 170 Peptic Disease and Its Complications 170 Crohn s Disease 171... 

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...

Duodenal duplication and diverticulum are usually asymptomatic lesions, often diagnosed incidentally by imaging. They may, infrequently, become symptomatic owing to complications such as acute inflammation, perforation, hemorrhage, acute pancreatitis, intussusception, or biliary obstruction (OsHiMOA et al. 1998 Rao 1999). 

Oshimoa K, Suzuki N, Ikeda H et al (1998) Infected duodenal duplication with unusual clinical and radiological manifestations a case report. Pediatr Radiol 28 518-520... 

Dunn s post test A statistical multiple comparison test used post hoc after certain other multiple group tests (e.g. Kruskal-U llis) to narrow down which groups are significantly different from which other groups, duodenal ulcer See peptic ulcer, duplicate genes Two identical genes that display the same phenotypic action, but occur on different chromosomes. 

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. 

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