## **Core Concept**
The question revolves around the management of a postoperative complication following laparoscopic cholecystectomy, specifically a cystic duct leak leading to a subhepatic collection. This condition requires a careful approach to prevent further morbidity and manage the bile leak effectively.

## **Why the Correct Answer is Right**
The best management for a cystic duct leak with a significant subhepatic collection, as seen on the 5th postoperative day after laparoscopic cholecystectomy, involves **percutaneous drainage of the fluid collection**. This approach allows for the evacuation of the bile collection, reduction of pressure and pain, and often, the leak will close spontaneously once the downstream pressure is relieved. This method is less invasive compared to immediate surgery and can be highly effective.

## **Why Each Wrong Option is Incorrect**
- **Option A: Immediate laparotomy** - This is a more invasive approach that is generally reserved for cases with severe peritonitis, hemodynamic instability, or failure of conservative management. It's not typically the first line for a stable patient with a contained leak.
- **Option C: Laparotomy and surgical exploration of bile duct and T-tube insertion** - Similar to immediate laparotomy, this is a very invasive approach usually considered for more complex bile duct injuries or when there's suspicion of a major bile duct injury that requires surgical repair.
- **Option D: Laparoscopic cystic duct ligation & percutaneous drain** - While adding a percutaneous drain is appropriate, re-operating laparoscopically might not be necessary for a contained leak and could add risk.
- **Option E: Roux en loop hepatojejunostomy** - This is a major surgical procedure typically reserved for complex bile duct injuries or when there's a significant defect in the bile duct that cannot be managed with less invasive techniques.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that many postoperative bile leaks can be managed conservatively or with **interventional radiology techniques**, such as percutaneous drainage. This approach can avoid the risks associated with re-operation.

## **Correct Answer: B. Percutaneous drainage of fluid**