## **Core Concept**
Chronic calculous cholecystitis is a condition characterized by chronic inflammation of the gallbladder due to the presence of gallstones. The management of this condition often involves surgical intervention to alleviate symptoms and prevent complications. The choice of surgical procedure depends on various factors including the patient's overall health, the presence of bile duct stones, and the surgeon's expertise.

## **Why the Correct Answer is Right**
The correct answer, **. Laparoscopic cholecystectomy**, is the procedure of choice for chronic calculous cholecystitis in a patient with no dilated common bile duct and normal liver function tests. This is because laparoscopic cholecystectomy is a minimally invasive surgical technique that offers several advantages over open cholecystectomy, including less postoperative pain, shorter hospital stay, and quicker recovery. It is suitable for patients with uncomplicated chronic cholecystitis and no evidence of bile duct obstruction.

## **Why Each Wrong Option is Incorrect**
- **Option A:** . **Open cholecystectomy** is a more invasive procedure that is generally reserved for cases where laparoscopic surgery is not feasible or safe, such as in severe inflammation, suspected bile duct injury, or in patients with significant comorbidities that preclude laparoscopic surgery.
- **Option B:** . **Endoscopic retrograde cholangiopancreatography (ERCP)** is primarily used for diagnosing and treating conditions related to the bile and pancreatic ducts, such as removing bile duct stones. It is not a treatment for cholecystitis itself but may be used preoperatively if there is suspicion of bile duct stones.
- **Option D:** . **Percutaneous cholecystostomy** is typically reserved for patients who are high-risk surgical candidates or have acute cholecystitis with significant inflammation making surgery risky. It involves placing a drain into the gallbladder under imaging guidance to drain bile and reduce inflammation.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that laparoscopic cholecystectomy is considered the gold standard for the treatment of symptomatic gallstones and chronic cholecystitis in patients who are good surgical candidates. It is crucial to assess the patient's suitability for laparoscopic surgery, including evaluating for any bile duct dilation or stones that may require preoperative ERCP.

## **Correct Answer:** . Laparoscopic cholecystectomy