**Question:** Most common complication of Whipple's procedure is:-

A. Pancreatic fistula
B. Bile leak
C. Infection
D. Gastrointestinal obstruction

**Core Concept:** Whipple's procedure, also known as pancreaticoduodenectomy, is a surgical procedure performed to remove a portion of the pancreas, along with the head of the stomach, duodenum, and nearby lymph nodes. It is primarily used to treat malignant tumors within these regions.

**Why the Correct Answer is Right:** The most common complication of Whipple's procedure is pancreatic fistula (Option A). A pancreatic fistula is an abnormal communication between the pancreatic duct and the surrounding tissues, leading to leakage of pancreatic enzymes and fluids into the abdominal cavity. This can result in abdominal pain, infection, and other complications such as electrolyte imbalances and malnutrition.

**Why Each Wrong Option is Incorrect:**

B. Bile leak (Option B) is another potential complication of Whipple's procedure, but it is less common than pancreatic fistula. Bile leak occurs when there is leakage of bile into the abdominal cavity, leading to symptoms such as abdominal pain, fever, and jaundice.

C. Infection (Option C) is a general risk of any surgical procedure, but it is not the most common complication of Whipple's procedure.

D. Gastrointestinal obstruction (Option D) can occur due to postoperative adhesions or strictures, but it is not the most common complication of Whipple's procedure.

**Clinical Pearl:** Despite the risks associated with Whipple's procedure, it remains a necessary intervention for treating malignant tumors in the pancreatic head region, as these tumors often cannot be managed through other surgical approaches. Postoperative care and monitoring are crucial to detect and manage complications promptly, including pancreatic fistula and bile leak.