Hepatobiliary Surgery Practice Questions

Q: During a laparoscopic cholecystectomy, a lateral injury to the Common Bile Duct is identified. What is the most appropriate next step in management?

Convert to open procedure with T -tube drainage. ***Convert to open procedure with T-tube drainage*** - Recognizing a common bile duct (CBD) injury intraoperatively requires immediate conversion to an **open procedure** to ensure adequate visualization and repair. - A **T-tube** is placed to provide biliary decompression and allow for healing across the primary repair or reconstruction, minimizing the risk of a post-operative **bile leak** or **stricture**. *Continue the laparoscopic procedure and place a drain* - Continuing laparoscopically after recognizing a major **CBD injury** is dangerous as it prevents adequate surgical exploration and repair of the ductal structure. - Placing a **drain** alone does not repair the duct; it only manages extravasated bile, leading to high morbidity and potentially life-threatening **biliary peritonitis**. *Ligate the duct proximal to the injury* - Simple ligation of the CBD will result in immediate **extrahepatic biliary obstruction**, causing obstructive **jaundice** and subsequent liver injury. - This approach is never acceptable; the integrity of the biliary tract must be maintained via **biliary reconstruction** (e.g., end-to-end anastomosis or hepaticojejunostomy). *Close the abdomen and refer for ERCP* - Closing the abdomen without addressing a known intraoperative iatrogenic injury is considered malpractice, as it leads to **peritonitis** and sepsis. - **ERCP** is reserved for postoperative management or diagnosis of leak/stricture; it cannot repair an acute, complete, or severe lateral injury identified during the original surgery.

Q: A 60-year-old patient presents with pruritus and obstructive jaundice. Physical examination reveals a palpable, non-tender gallbladder. What is the most likely diagnosis?

Carcinoma of the head of the pancreas. ***Carcinoma of the head of the pancreas*** - This clinical presentation represents **Courvoisier's sign**, which is a palpable, non-tender gallbladder in the presence of painless obstructive jaundice, highly suggestive of a malignant obstruction of the common bile duct. - The most common malignancy causing this is a tumor in the **head of the pancreas**, which obstructs the distal common bile duct, leading to progressive jaundice. *Choledocholithiasis* - Typically presents with **biliary colic** (pain), as the obstruction is caused by a gallstone, which is generally painful due to acute inflammation and distension. - The gallbladder in choledocholithiasis is usually contracted or fibrotic due to chronic cholecystitis, making it **non-palpable**. *Cholangiocarcinoma* - While this can cause obstructive jaundice, it is less likely to present with a palpable, non-tender gallbladder than pancreatic head tumors unless it occurs in the distal common bile duct. - This diagnosis is statistically much **less common** than pancreatic cancer as a cause of Courvoisier's sign. *Gallbladder carcinoma* - While this may cause jaundice if it invades the biliary tree, it more commonly presents with a **fixed, hard, irregular mass** in the gallbladder fossa rather than a smooth, palpable, non-tender gallbladder. - Patients with gallbladder cancer often have a long history of **cholelithiasis** and chronic gallbladder disease, which typically leads to a scarred, non-palpable organ.

Q: What organism causes emphysematous cholecystitis?

Clostridium perfringens. **Explanation:** **Emphysematous cholecystitis** is a severe, life-threatening variant of acute cholecystitis characterized by the presence of gas within the gallbladder wall, lumen, or pericholecystic tissues. **Why Clostridium perfringens is correct:** The primary pathophysiology involves **ischemia** of the gallbladder wall (often due to cystic artery compromise), which creates an anaerobic environment. This allows gas-forming organisms to proliferate. **Clostridium perfringens** is the most common anaerobic organism isolated. It produces gas through the fermentation of glucose, leading to the characteristic radiographic finding of "gas shadows" on X-ray or CT. Other common isolates include *E. coli* and *Klebsiella*. **Why the other options are incorrect:** * **Salmonella typhi:** Associated with chronic carrier states in the gallbladder and "typhoid cholecystitis," but it is not a gas-forming organism and does not cause emphysematous changes. * **Cytomegalovirus (CMV):** Typically causes cholecystitis in immunocompromised patients (e.g., AIDS) as part of CMV polyradiculopathy or acalculous cholecystitis, but not emphysematous disease. * **Bacteroides:** While *Bacteroides fragilis* can be found in polymicrobial intra-abdominal infections, it is a less common primary driver of emphysematous cholecystitis compared to Clostridia. **High-Yield Clinical Pearls for NEET-PG:** * **Risk Factors:** Strongly associated with **Diabetes Mellitus** (found in >30-50% of cases) and the elderly. * **Gender:** Unlike typical cholecystitis, it is more common in **males** (M:F ratio 3:1). * **Acalculous:** It is frequently acalculous (stones are absent in up to 30% of cases). * **Complications:** High risk of **gangrene and perforation** (5x higher than routine cholecystitis). * **Management:** Emergency cholecystectomy is the treatment of choice.

Question 1

During a laparoscopic cholecystectomy, a lateral injury to the Common Bile Duct is identified. What is the most appropriate next step in management?

Accepted Answer

Convert to open procedure with T -tube drainage

Answer

Continue the laparoscopic procedure and place a drain

Answer

Ligate the duct proximal to the injury

Answer

Close the abdomen and refer for ERCP

Question 2

A 60-year-old patient presents with pruritus and obstructive jaundice. Physical examination
reveals a palpable, non-tender gallbladder. What is the most likely diagnosis?

Accepted Answer

Carcinoma of the head of the pancreas

Answer

Choledocholithiasis

Answer

Cholangiocarcinoma

Answer

Gallbladder carcinoma

Question 3

A 28-year-old unrestrained male driver is brought to the trauma bay following a high-speed road traffic collision. Primary survey: GCS 14, HR 118 bpm, BP 94/60 mmHg with partial response to 1 litre of crystalloid. FAST examination is positive in the right upper quadrant. After partial haemodynamic stabilisation, a CT abdomen with contrast is performed and is shown (Image 2). His BP on return from CT is 88/54 mmHg despite ongoing resuscitation. What is the most appropriate next step?

Accepted Answer

C. Immediate damage control laparotomy with perihepatic packing

Answer

A. Repeat FAST examination and reassess haemodynamic response to a second litre of crystalloid

Answer

B. Urgent hepatic angioembolisation via interventional radiology

Answer

D. Formal hepatic resection of the injured lobe with intraoperative Pringle manoeuvre

Question 4

What organism causes emphysematous cholecystitis?

Accepted Answer

Clostridium perfringens

Answer

Salmonella typhi

Answer

Cytomegalovirus

Answer

Bacteroides

Question 5

Klatskin tumor is defined as:

Accepted Answer

Cholangiocarcinoma arising from the bifurcation of the bile duct

Answer

Primitive neuroectodermal tumor in the chest

Answer

Lung adenocarcinoma involving the apical region

Answer

Enterochromaffin cell tumor

Hepatobiliary Surgery — MCQs

Hepatobiliary Surgery — MCQs

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