## **Core Concept**
The annular pancreas is a rare congenital anomaly where pancreatic tissue surrounds the second part of the duodenum, potentially causing intestinal obstruction. The condition can lead to duodenal stenosis or obstruction, necessitating surgical intervention. The primary goal of treatment is to relieve the obstruction while preserving pancreatic function.

## **Why the Correct Answer is Right**
The correct approach to managing annular pancreas involves surgical techniques that aim to relieve the obstruction caused by the pancreatic tissue encircling the duodenum. **Duodeno-duodenostomy** is considered a preferred surgical method. This procedure involves creating a bypass around the obstructed segment by directly connecting the proximal and distal parts of the duodenum. This technique is favored because it is less invasive, effectively relieves obstruction, and preserves the pancreatic tissue and its function.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because while **pancreatico-duodenectomy (Whipple procedure)** is a major surgical operation used for treating certain pancreatic and periampullary disorders, it is more extensive than required for annular pancreas and involves removal of the pancreatic head, which is not necessary for this condition.
- **Option B:** This option might seem plausible but is not specified; however, procedures that simply involve **incising or partially resecting the pancreatic tissue** encircling the duodenum can lead to pancreatic fistulae and other complications, making them less favorable.
- **Option C:** **Pancreaticoduodenal artery ligation** might be considered in some vascular anomalies but is not a standard treatment for relieving mechanical obstruction caused by annular pancreas.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that the management of annular pancreas should focus on relieving the obstruction with minimal intervention to the pancreas itself. **Duodeno-duodenostomy** is a preferred method because it effectively bypasses the obstruction without compromising pancreatic function. Recognizing this condition and its optimal management can significantly impact patient outcomes.

## **Correct Answer:** . Duodeno-duodenostomy