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Erschienen in:
25.11.2017 | Classics in Abdominal Imaging
The double channel pylorus
Erschienen in: Abdominal Radiology | Ausgabe 8/2018
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The double channel pylorus sign refers to the fluoroscopic appearance of a gastroduodenal fistula where two distinct channels between the gastric antrum and duodenal bulb are outlined by barium (Fig. 1). Like a river with a double arched bridge (Fig. 2), the flow of barium is split into two openings separated by a septum of tissue. Unlike in our case, the fistulous tract is generally present superiorly along the lesser curvature aspect of the antrum and is connected to the superior fornix of the duodenal bulb [1].
Fig. 1
Single contrast barium upper GI fluoroscopic study shows two distinct channels between the gastric antrum and duodenal bulb. The true lumen is superior (yellow arrow) with the fistulous tract parallel to it inferiorly (red arrowhead)
Fig. 2
Double arch bridge (Meganebashi or Spectacles Bridge, over the Nakashima River, Nagasaki, Japan). Courtesy https://commons.wikimedia.org/wiki/File:Nagasaki_Meganebashi_M5257.jpg
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