**Question:** Laparoscopic cholecystectomy done in a patient with cholelithiasis. Pathology report shows adenocarcinoma with invasion of muscular layer. CT was normal. Further treatment is

A. Surveillance
B. Radical cholecystectomy
C. Radiofrequency ablation
D. Chemotherapy

**Core Concept:** Cholelithiasis is the presence of gallstones within the biliary tract, which may lead to complications like cholecystitis, cholangitis, or cholecystectomy. Pathology report findings of adenocarcinoma with muscular layer invasion indicate a more aggressive cancer type, and CT scan being normal does not provide sufficient evidence for the diagnosis or extent of the disease.

**Why the Correct Answer is Right:** The correct answer (B. Radical cholecystectomy) is chosen because the presence of gallstones and the pathology report of adenocarcinoma with muscular layer invasion indicates an advanced disease state. While the CT scan is normal, it does not rule out the possibility of deeper invasion or distant disease. A more extensive surgical procedure, such as radical cholecystectomy, is warranted to ensure complete removal of the tumor and prevent residual or recurrent disease.

**Why Each Wrong Option is Incorrect:**

A. Surveillance: This option focuses on monitoring the patient without addressing the aggressive nature of the cancer and the possibility of deeper invasion or distant disease.
C. Radiofrequency ablation: This procedure is used for localized tumors and is not applicable for advanced gallbladder cancer with muscular layer invasion.
D. Chemotherapy: Chemotherapy is typically considered for patients with advanced or recurrent disease, but it is not a definitive treatment for primary gallbladder cancer with muscular layer invasion. Radical cholecystectomy is the appropriate treatment for this patient.

**Core Concept:** Gallbladder cancer is a rare malignancy arising from the epithelial cells of the gallbladder. It is generally associated with gallstones and inflammation (chronic cholecystitis) due to the development of gallstones.

**Clinical Pearls:** Gallbladder cancer is often asymptomatic in its early stages, leading to a delayed diagnosis. Radical cholecystectomy is the standard surgical treatment for localized gallbladder cancer. While surveillance may be necessary for some benign conditions, it is not a suitable treatment option for gallbladder cancer with muscular layer invasion.