This is an odd defect manifested by a loop of pancreatic tissue. Etiologically, it’s postulated that the ventral pancreatic Anlagen divides too early during embryological development into two segments that develop separately. As mentioned earlier, this anomaly is an incidental finding in a majority of chimpanzees. However, in the other minority, the annular pancreas has been associated with the following complications. Duodenal stenosis associated with intestinal obstruction often requires surgical intervention. The section of the duodenum surrounded by the pancreatic tissue undergoes narrowing of the lumen with an ensuing impedance of the normal transit of the gut contents from the stomach into the small intestines.

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