Hepatobiliary Surgery — MCQs

Hepatobiliary Surgery Indian Medical PG Practice Questions and MCQs

Question 531: According to the latest AJCC 8th edition TNM classification of carcinoma of the gallbladder, what is the minimum number of lymph nodes involved in N2?

A. 3
B. 4 (Correct Answer)
C. 5
D. 6

Explanation: ***4*** - According to the **AJCC 8th edition TNM classification** for gallbladder carcinoma, **N2** is defined by the involvement of **4 or more regional lymph nodes**. - This classification specifically groups patients with extensive lymph node involvement, which carries a worse prognosis. *3* - The involvement of **1 to 3 regional lymph nodes** in gallbladder carcinoma corresponds to **N1** stage in the **AJCC 8th edition**. - This option incorrectly identifies the threshold for N2 as it falls within the N1 criteria. *5* - While 5 lymph nodes would qualify as N2 (**4 or more regional lymph nodes**), it is not the *minimum* number required for the classification. - The classification of N2 begins at 4 involved lymph nodes, not 5. *6* - Similar to 5, 6 involved lymph nodes would also be classified as N2, but it is not the *minimum* number required. - The definition for **N2** stage starts at **4 regional lymph nodes**.

Question 532: Pringle's maneuver is mainly used to control bleeding from which site?

A. IVC
B. Cystic artery
C. Hepatic vein
D. Liver parenchyma (Correct Answer)

Explanation: ***Liver parenchyma*** - Pringle's maneuver involves **clamping the hepatoduodenal ligament**, which contains the portal triad (hepatic artery, portal vein, and bile duct), to temporarily **reduce blood flow to the liver**. - This maneuver is primarily performed during **liver surgery** to control bleeding from the liver parenchyma itself, allowing for safer resection or repair of liver injuries. *IVC* - Bleeding from the **inferior vena cava (IVC)** is not directly controlled by Pringle's maneuver. The IVC is located posterior to the liver parenchyma and is not part of the hepatoduodenal ligament. - Controlling IVC bleeding typically requires **direct repair** or other specific vascular control techniques, often involving clamps placed directly on the IVC. *Cystic artery* - While the **cystic artery** is a branch of the right hepatic artery (which is occluded during Pringle's maneuver), the maneuver is not *mainly* used to control isolated cystic artery bleeding. - **Cystic artery bleeding** is typically encountered during cholecystectomy and is controlled by ligating or clipping the artery directly, rather than relying on a general liver inflow occlusion. *Hepatic vein* - The **hepatic veins** drain directly into the IVC from the liver parenchyma and are not part of the hepatoduodenal ligament, thus their blood flow is not directly occluded by Pringle's maneuver. - Bleeding from the hepatic veins is a more challenging complication in liver surgery, often requiring **direct compression**, suture repair, or venovenous bypass to manage.

Question 533: Best suture for common bile duct is:

A. Synthetic Non-Absorbable
B. Non-synthetic Non-Absorbable
C. Non-synthetic absorbable
D. Synthetic Absorbable (Correct Answer)

Explanation: ***Synthetic absorbable*** - **Synthetic absorbable sutures** are ideal for the common bile duct because they provide adequate **wound support** during the initial healing phase. - They then **gradually lose tensile strength** and are absorbed, avoiding the long-term foreign body reaction or risk of stone formation associated with non-absorbable sutures in the biliary system. *Synthetic Non-Absorbable* - **Synthetic non-absorbable sutures** would maintain long-term tensile strength, which is unnecessary and potentially harmful in the common bile duct. - Their presence could lead to **foreign body reactions**, inflammation, and serve as a nidus for **biliary stone formation** or erosion into the lumen. *Non-synthetic absorbable* - **Non-synthetic absorbable sutures**, such as catgut, are derived from natural materials and can elicit a **stronger inflammatory response**. - They also have **less predictable absorption rates** and tensile strength compared to synthetic absorbable sutures, making them less suitable for precise biliary repair. *Non-synthetic Non-Absorbable* - **Non-synthetic non-absorbable sutures**, like silk, would persist indefinitely within the bile duct. - This significantly increases the risk of **biliary stone formation** and chronic inflammation due to their fibrous nature, making them unsuitable for this application.

Question 534: Which of the following statements regarding choledochal cyst is true?

A. Epigastric mass is always present in choledochal cysts
B. Jaundice is a pathognomonic sign of choledochal cysts
C. Roux-en-Y hepaticojejunostomy is the treatment of choice. (Correct Answer)
D. Abdominal pain is universally present in all cases

Explanation: ***Roux-en-Y hepaticojejunostomy is the treatment of choice.*** - This procedure involves **excision of the cyst** and creation of a Roux-en-Y limb to drain bile, effectively preventing **cholangitis**, **pancreatitis**, and **malignant transformation**. - It is crucial for managing choledochal cysts due to the high risk of **cholangiocarcinoma** if left untreated. *Epigastric mass is always present in choledochal cysts* - While an **epigastric mass** can be a symptom, it is **not always present**, especially in smaller cysts or specific types. - The classic triad of pain, jaundice, and an abdominal mass is only seen in a minority of patients (approximately 20-30%). *Jaundice is a pathognomonic sign of choledochal cysts* - **Jaundice** is a common symptom due to bile duct obstruction, but it is **not pathognomonic** as many other conditions can cause jaundice. - It often fluctuates and may not be present consistently throughout the disease course. *Abdominal pain is universally present in all cases* - **Abdominal pain** is a frequent symptom, particularly in older children and adults, but it is **not universally present** in all cases. - Some patients, especially infants, may present primarily with **jaundice** or **acholic stools** without significant pain.

Question 535: The treatment of choice for a mucocele of the gallbladder is:

A. Aspiration of mucus
B. Cholecystectomy (Correct Answer)
C. Cholecystostomy
D. Antibiotic and observation

Explanation: ***Cholecystectomy*** - **Cholecystectomy** is the definitive treatment for gallbladder mucocele because it removes the diseased organ, preventing complications such as perforation, ascending cholangitis, or conversion to empyema. - A mucocele is typically caused by **chronic obstruction of the cystic duct**, leading to the accumulation of sterile mucus and distension of the gallbladder, which requires removal to prevent recurrence and further issues. *Aspiration of mucus* - **Aspiration of mucus** is a temporary measure and does not address the underlying cause of the mucocele (cystic duct obstruction), leading to a high risk of reaccumulation and infection. - This procedure carries risks such as **perforation** and **bile leakage**, and is not considered a definitive treatment. *Cholecystostomy* - **Cholecystostomy** involves surgically creating an opening in the gallbladder for drainage and is generally reserved for critically ill patients who cannot tolerate a cholecystectomy. - While it can relieve distension, it does not remove the diseased gallbladder or the source of obstruction, carrying the risk of persistent or recurrent issues. *Antibiotic and observation* - A gallbladder mucocele contains **sterile mucus** and is not primarily an infectious process, therefore antibiotics are generally ineffective unless secondary infection (empyema) has occurred. - **Observation** alone is not appropriate due to the risk of significant complications such as rupture, biliary peritonitis, or conversion to hydrops and empyema, which can be life-threatening.

Question 536: What type of choledochal cyst is associated with Caroli's disease?

A. Type 1 Choledochal cyst
B. Type V Choledochal cyst (Correct Answer)
C. Type III Choledochal cyst
D. Type IV Choledochal cyst

Explanation: ***Type V Choledochal cyst*** - **Type V choledochal cyst is synonymous with Caroli's disease** according to the Todani classification system. - Characterized by **multiple intrahepatic bile duct cystic dilations** without extrahepatic involvement. - Caroli's disease presents with **saccular dilations confined to the intrahepatic bile ducts**, which defines Type V cysts. *Type I Choledochal cyst* - Involves **fusiform or saccular dilation of the common bile duct** (extrahepatic). - Most common type (80-90% of cases) but does **not involve intrahepatic ducts**. - Single localized dilation, unlike the multifocal intrahepatic pattern of Caroli's disease. *Type III Choledochal cyst* - Also known as **choledochocele**. - Cystic dilation of the **intraduodenal portion of the common bile duct**. - Limited to the distal CBD within the duodenal wall, completely different distribution from Caroli's disease. *Type IV Choledochal cyst* - Involves **multiple cysts affecting both intrahepatic AND extrahepatic bile ducts** (Type IVa) or **multiple extrahepatic cysts only** (Type IVb). - While Type IVa has intrahepatic involvement, Caroli's disease specifically refers to **purely intrahepatic** disease (Type V), not combined intra- and extrahepatic disease.

Question 537: Which surgical procedure is most likely to lead to the development of hepatic encephalopathy due to increased ammonia levels?

A. Splenorenal shunt
B. Portacaval anastomosis (Correct Answer)
C. Sugiura operation
D. Talma-Morison Operation

Explanation: ***Portacaval anastomosis*** - This procedure directly connects the **portal vein** to the **inferior vena cava**, bypassing the liver. - As a result, **ammonia** and other gut-derived toxins that would normally be detoxified by the liver are shunted directly into the systemic circulation, leading to or worsening **hepatic encephalopathy**. *Splenorenal shunt* - A **splenorenal shunt** connects the splenic vein to the left renal vein, which also diverts portal blood flow away from the liver but is generally associated with a lower incidence of encephalopathy compared to portacaval shunts. - While it can increase ammonia levels, the design of this shunt typically allows some continued portal flow to the liver, mitigating the risk compared to complete portacaval diversion. *Sugiura operation* - The **Sugiura operation** is a devascularization procedure involving extensive esophageal and gastric transection and re-anastomosis, aimed at controlling variceal bleeding. - This procedure does not involve the creation of a major portosystemic shunt, and therefore, it does not directly lead to increased systemic ammonia levels or higher risk of hepatic encephalopathy. *Talma-Morison Operation* - The **Talma-Morison operation** (or omentopexy) involves suturing the omentum to the abdominal wall to promote collateral circulation and relieve portal hypertension. - This procedure aims to create new collateral pathways, but it does not involve a direct, large-bore shunt that bypasses the liver significantly, making it less likely to cause a dramatic increase in systemic ammonia.

Question 538: What is the classification of choledochocele among choledochal cysts?

A. II
B. III (Correct Answer)
C. IV
D. V

Explanation: ***III*** - A choledochocele is a specific type of **choledochal cyst** that involves the **intraduodenal dilatation** of the distal common bile duct. - It is classified as Type III in the Todani classification system for choledochal cysts. *II* - Type II choledochal cysts are characterized by a **diverticulum** protruding from the side of the main bile duct. - This morphology is distinct from the intraduodenal dilatation seen in a choledochocele. *IV* - Type IV choledochal cysts are defined by **multiple cystic dilatations** that can involve both intrahepatic and extrahepatic portions of the bile ducts (Type IVA) or only extrahepatic ducts (Type IVB). - This classification represents a more diffuse and widespread cystic disease compared to a single choledochocele. *V* - Type V choledochal cysts are also known as **Caroli's disease**, which involves diffuse **cystic dilatation of the intrahepatic bile ducts**. - This condition is specifically limited to the intrahepatic biliary tree, unlike the extrahepatic or intraduodenal nature of a choledochocele.

Question 539: Treatment of a symptomatic simple cyst of the liver is:

A. Percutaneous drainage
B. Deroofing (Correct Answer)
C. Aspiration
D. Cystoenterostomy

Explanation: ***Deroofing*** - **Deroofing** (or fenestration) is the standard surgical treatment for symptomatic simple liver cysts. - This procedure involves **excising a portion of the cyst wall**, allowing permanent drainage into the peritoneal cavity and preventing recurrence. *Percutaneous drainage* - While sometimes used for initial diagnosis or symptom relief, **percutaneous drainage alone** of a simple cyst often leads to recurrence because the cyst wall remains intact and continues to produce fluid. - It is typically reserved for **patients who are not surgical candidates** or as a temporary measure. *Cystoenterostomy* - **Cystoenterostomy** involves creating a communication between the cyst and a loop of bowel (e.g., jejunum). - This procedure is generally reserved for **complex or large cysts** that are unresectable or in specific situations like pancreatic pseudocysts, and carries higher risks than deroofing for simple cysts. *Aspiration* - **Aspiration** is a temporary measure, similar to percutaneous drainage without sclerosing agents. - It almost always results in **recurrence** as the secretory lining of the cyst remains intact.

Practice by Chapter

Liver Anatomy and Physiology

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Benign Liver Lesions

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Liver Abscess

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Hepatocellular Carcinoma

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Metastatic Liver Disease

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Cirrhosis and Portal Hypertension

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Liver Trauma

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Cholelithiasis and Cholecystitis

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Choledocholithiasis

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Biliary Tract Tumors

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ERCP and Its Complications

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Liver Transplantation Basics

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