**Core Concept**
Pancreatic abscess is a localized collection of pus within the pancreas, often resulting from pancreatitis, pancreatic trauma, or pancreatic surgery. The management of a pancreatic abscess typically involves drainage to prevent further infection and complications.

**Why the Correct Answer is Right**
External drainage is the preferred management for pancreatic abscess. This involves creating a surgical opening to allow the collection of pus to drain out. The procedure may be performed under general anesthesia and requires close monitoring of the patient's vital signs. External drainage is often performed by a surgical team, including general surgeons and interventional radiologists. The goal of external drainage is to eliminate the source of infection and prevent further complications.

**Why Each Wrong Option is Incorrect**
**Option A:** Needle aspiration is not typically used for pancreatic abscess management due to the risk of spreading the infection and the difficulty in accessing the abscess through a needle. Needle aspiration may be used in some cases, but it is not the preferred method of management.
**Option B:** Gastro-cytostomy involves creating a surgical connection between the stomach and the pancreas to drain pancreatic secretions. However, this procedure is not suitable for managing a pancreatic abscess, as it does not address the collection of pus.
**Option D:** Jejuno-cystostomy involves creating a surgical connection between the jejunum and a cyst or abscess to drain its contents. While this procedure can be used to manage some types of pancreatic pseudocysts, it is not the preferred method for managing a pancreatic abscess.

**Clinical Pearl / High-Yield Fact**
It is essential to differentiate between a pancreatic abscess and a pancreatic pseudocyst. Pancreatic pseudocysts are fluid collections without infection, whereas pancreatic abscesses are infected collections that require drainage.

**✓ Correct Answer: C. External drainage**