Which anomaly involves the head surrounding the second portion of the duodenum and may cause obstruction?

Which anomaly involves the head surrounding the second portion of the duodenum and may cause obstruction?

• A. Annular Pancreas
• B. Pancreas divisum
• C. Aberrant Tissue
• D. Pancreatic Cyst

Answer: (A)

Annular pancreas is a congenital pancreatic anomaly in which pancreatic tissue forms a ring around the second part of the duodenum, causing partial or complete obstruction. This happens because the ventral pancreatic bud takes an abnormal path during embryologic development, encircling the duodenum as it moves to fuse with the dorsal bud. The resulting ring narrows the duodenal lumen, leading to obstructive symptoms, often presenting in newborns with bilious vomiting. Pancreas divisum, by contrast, is a ductal issue where the dorsal and ventral pancreatic ducts fail to fuse, altering drainage rather than encircling the duodenum. Aberrant tissue and pancreatic cyst describe other anomalies or lesions that don’t inherently form the obstructing ring around the second portion of the duodenum.

Annular pancreas is a congenital pancreatic anomaly in which pancreatic tissue forms a ring around the second part of the duodenum, causing partial or complete obstruction. This happens because the ventral pancreatic bud takes an abnormal path during embryologic development, encircling the duodenum as it moves to fuse with the dorsal bud. The resulting ring narrows the duodenal lumen, leading to obstructive symptoms, often presenting in newborns with bilious vomiting.

Pancreas divisum, by contrast, is a ductal issue where the dorsal and ventral pancreatic ducts fail to fuse, altering drainage rather than encircling the duodenum. Aberrant tissue and pancreatic cyst describe other anomalies or lesions that don’t inherently form the obstructing ring around the second portion of the duodenum.