Hepatobiliary Surgery — MCQs

Hepatobiliary Surgery Indian Medical PG Practice Questions and MCQs

Question 41: What is the most likely cause of intermittent jaundice in an elderly man?

A. Liver cirrhosis
B. Perampullary carcinoma (Correct Answer)
C. Carcinoma of the head of the pancreas
D. Hemolysis

Explanation: **Explanation:** The hallmark of **Periampullary Carcinoma** (specifically the ampullary subtype) is **intermittent jaundice**. This occurs due to the unique phenomenon of **"tumor sloughing."** As the tumor grows, it obstructs the common bile duct (CBD), causing jaundice. However, because these tumors are often friable, the central necrotic part of the tumor may slough off or undergo surface ulceration, temporarily relieving the obstruction and allowing bile to flow. This results in a characteristic waxing and waning of bilirubin levels. **Analysis of Options:** * **Carcinoma of the head of the pancreas:** Typically presents with **progressive, painless, and persistent** obstructive jaundice. Unlike ampullary tumors, pancreatic head tumors rarely slough enough to relieve obstruction. * **Liver cirrhosis:** Usually presents with chronic jaundice associated with signs of portal hypertension (ascites, splenomegaly). It is not typically "intermittent" in the obstructive sense. * **Hemolysis:** Causes pre-hepatic jaundice (unconjugated hyperbilirubinemia). While it can be episodic (e.g., G6PD deficiency crisis), it is not the most likely cause in an elderly man presenting with a surgical jaundice profile. **NEET-PG High-Yield Pearls:** 1. **Courvoisier’s Law:** In a patient with obstructive jaundice, if the gallbladder is palpable, the obstruction is unlikely to be a stone (as stones cause a fibrotic, non-distensible gallbladder). It suggests malignancy (e.g., Periampullary or Pancreatic head CA). 2. **Silver Stool (Thomas’s Sign):** A classic (though rare) sign of ampullary carcinoma, caused by the combination of acholic stool (biliary obstruction) and occult blood/melena (from the sloughing tumor). 3. **Triple Assessment:** For these cases, the investigation of choice is **CECT abdomen**, followed by **ERCP/EUS** for biopsy and staging.

Question 42: Which of the following can cause acalculous cholecystitis?

A. Diabetes Mellitus (Correct Answer)
B. Total Parenteral Nutrition
C. Leptospirosis
D. Estrogen therapy

Explanation: **Explanation:** **Acalculous cholecystitis** refers to inflammation of the gallbladder in the absence of gallstones. It typically occurs in critically ill patients due to a combination of **bile stasis** and **gallbladder wall ischemia**. 1. **Why Diabetes Mellitus is the Correct Answer:** Diabetes Mellitus is a recognized risk factor for acalculous cholecystitis primarily due to **autonomic neuropathy** (leading to gallbladder dysmotility and stasis) and **microangiopathy** (causing reduced perfusion to the gallbladder wall). In the context of this specific question format, DM is a systemic condition that predisposes patients to this pathology, often presenting more insidiously than in trauma patients. 2. **Analysis of Other Options:** * **Total Parenteral Nutrition (TPN):** While TPN causes bile stasis, it is more classically associated with **gallstone formation (cholelithiasis)** and biliary sludge due to the lack of CCK-mediated gallbladder contraction. While it *can* contribute to acalculous cholecystitis in ICU settings, DM is often prioritized in clinical vignettes focusing on systemic metabolic predispositions. * **Leptospirosis:** This typically causes jaundice (Weil’s disease) via hepatic dysfunction and hemolysis, but it is not a primary or common cause of acalculous cholecystitis. * **Estrogen Therapy:** Estrogen increases the cholesterol saturation of bile, making it a major risk factor for **calculous (stone-forming)** cholecystitis, not the acalculous variety. **High-Yield Clinical Pearls for NEET-PG:** * **Most Common Setting:** Post-operative state (major surgery), severe burns, multi-organ failure, and prolonged fasting. * **Pathogenesis:** Ischemia of the cystic artery (an end artery) + chemical irritation from stagnant bile. * **Diagnosis:** Ultrasound is the initial test (showing wall thickening >4mm and pericholecystic fluid), but **HIDA scan** (showing non-visualization of the gallbladder) is the most sensitive. * **Complication:** Higher risk of gangrene and perforation compared to calculous cholecystitis.

Question 43: Murphy sign is seen in:

A. Acute appendicitis
B. Acute cholecystitis (Correct Answer)
C. Acute pancreatitis
D. Acute cholangitis

Explanation: **Explanation:** **Murphy’s Sign** is a classic clinical finding used to diagnose **Acute Cholecystitis**. It is elicited by asking the patient to take a deep breath while the examiner applies pressure over the right upper quadrant (specifically at the gallbladder point, where the lateral border of the rectus abdominis meets the costal margin). As the diaphragm descends during inspiration, the inflamed gallbladder comes into contact with the examiner’s fingers, causing sharp pain and a sudden **"arrest of inspiration."** **Analysis of Options:** * **Acute Cholecystitis (Correct):** The inflammation of the gallbladder wall makes it exquisitely sensitive to palpation when it hits the abdominal wall during inspiration. * **Acute Appendicitis:** Characterized by McBurney’s point tenderness, Rovsing’s sign, or the Psoas sign. Murphy’s sign is not associated with the appendix. * **Acute Pancreatitis:** Typically presents with epigastric pain radiating to the back. Clinical signs include Cullen’s or Grey Turner’s sign (in hemorrhagic cases), but not Murphy’s sign. * **Acute Cholangitis:** Presents with **Charcot’s Triad** (fever, jaundice, and RUQ pain). While RUQ pain is present, the specific "inspiratory arrest" of Murphy's sign is specific to gallbladder inflammation, not bile duct infection. **High-Yield Clinical Pearls for NEET-PG:** * **Sonographic Murphy Sign:** Elicited by pressure from the ultrasound probe directly over the gallbladder; it is more sensitive than the manual physical exam. * **Boas' Sign:** Hyperesthesia (increased sensitivity) between the 9th and 11th ribs posteriorly on the right side, also seen in acute cholecystitis. * **False Positives:** Murphy’s sign may be absent in the elderly or in patients with gangrenous cholecystitis due to nerve denervation.

Question 44: All of the following are criteria of non-resectability in patients with hilar cholangiocarcinoma, except?

A. Hepatic duct involvement up to secondary radicals bilaterally
B. Encasement or occlusion of main portal vein proximal to its bifurcation
C. Atrophy of one lobe with encasement of contralateral portal vein branch
D. Atrophy of one lobe with ipsilateral involvement of secondary biliary radicals (Correct Answer)

Explanation: ### Explanation Hilar cholangiocarcinoma (Klatskin tumor) resectability is determined by the ability to achieve an R0 resection while leaving a functional future liver remnant (FLR). **1. Why Option D is the Correct Answer:** Resectability depends on whether the disease can be completely removed from one side while preserving the other. **Atrophy of one lobe with ipsilateral (same side) involvement of secondary biliary radicals** is still **resectable**. In this scenario, the surgeon can perform a formal hemihepatectomy (removing the atrophied lobe and the involved ducts) because the contralateral side remains healthy and functional. **2. Analysis of Non-Resectability Criteria (Incorrect Options):** * **Option A:** Involvement of secondary biliary radicals **bilaterally** (Bismuth-Corlette Type IV) means there is no "clean" side to preserve; hence, it is unresectable. * **Option B:** Encasement or occlusion of the **main portal vein** proximal to its bifurcation implies the blood supply to the entire liver is compromised, making curative resection impossible. * **Option C:** **Atrophy of one lobe with contralateral (opposite side) portal vein involvement** is a classic sign of unresectability. If you remove the atrophied lobe, the remaining lobe has a compromised blood supply; if you don't, you leave tumor behind. **Clinical Pearls for NEET-PG:** * **Bismuth-Corlette Classification:** Type I (Common Hepatic Duct), Type II (Bifurcation), Type IIIa/b (Right/Left secondary radicals), Type IV (Multicentric/Bilateral secondary radicals). * **Triad of Unresectability:** Bilateral ductal involvement up to secondary radicals, bilateral vascular involvement, or atrophy of one lobe with contralateral vascular/ductal involvement. * **Investigation of Choice:** MRCP is preferred for biliary anatomy; CT Angiography for vascular assessment. * **Treatment:** Surgical resection (Hemihepatectomy + Caudate lobe excision + Lymphadenectomy) is the only curative intent treatment.

Question 45: Regarding bile duct injuries following cholecystectomy, which of the following statements is false?

A. The incidence following open cholecystectomy is in the range of 0.2 to 0.3%.
B. The incidence rate following laparoscopic cholecystectomy is three times higher than the rates following open cholecystectomy.
C. Untreated cases may develop secondary biliary cirrhosis.
D. Routine use of 'open' technique of laparoscopic port insertion has resulted in a decline in the incidence of post-laparoscopic cholecystectomy bile duct injuries. (Correct Answer)

Explanation: **Explanation:** **1. Why Option D is the Correct (False) Statement:** The "open" (Hasson) technique of port insertion is designed to prevent **vascular and visceral injuries** (like bowel perforation) during the creation of pneumoperitoneum. It has **no impact** on the incidence of bile duct injuries (BDI). BDI typically occurs during the dissection of Calot’s triangle due to misidentification of anatomy (the "classic injury" where the common bile duct is mistaken for the cystic duct), not during port placement. **2. Analysis of Other Options:** * **Option A:** Historically, the incidence of BDI in **open cholecystectomy** is low, documented consistently between **0.1% and 0.3%**. * **Option B:** With the advent of the laparoscopic era, the BDI rate increased significantly. Current data suggests the incidence in **laparoscopic cholecystectomy** is approximately **0.4% to 0.6%**, which is roughly **2–3 times higher** than the open approach. * **Option C:** Chronic, untreated, or poorly managed bile duct strictures lead to proximal biliary stasis and recurrent cholangitis, which eventually progresses to **secondary biliary cirrhosis** and portal hypertension. **3. High-Yield Clinical Pearls for NEET-PG:** * **Most Common Cause of BDI:** Misidentification of the CBD/CHD as the cystic duct. * **Strasberg Classification:** The most widely used system to classify laparoscopic BDIs (Type A to E). * **Prevention:** The **"Culture of Safety in Cholecystectomy"** emphasizes the **"Critical View of Safety" (CVS)**—dissecting Calot’s triangle to see only two structures (cystic duct and artery) entering the gallbladder and the lower third of the cystic plate. * **Management:** If BDI is suspected post-operatively, the initial investigation of choice is **Ultrasound**, but the gold standard for defining anatomy is **MRCP**. The definitive repair for major BDI is **Roux-en-Y Hepaticojejunostomy**.

Question 46: All of the following are true about the hydatid disease of the liver, EXCEPT:

A. Most commonly located in the right lobe of the liver
B. Hepatic resection is never performed (Correct Answer)
C. Mostly asymptomatic
D. The most common causative organism is Echinococcus granulosus

Explanation: ### Explanation **Hydatid disease of the liver**, caused by the larval stage of the cestode **Echinococcus granulosus**, is a significant surgical topic for NEET-PG. **Why Option B is the Correct Answer (The Exception):** The statement "Hepatic resection is never performed" is false. While conservative surgical techniques (like the **Mabit-Lagrot procedure** or PAIR) are more common, **hepatic resection (lobectomy or segmentectomy)** is a recognized treatment modality. It is specifically indicated for large cysts, multiple cysts confined to one lobe, cysts with biliary communication, or recurrent disease where simpler procedures might fail. **Analysis of Incorrect Options:** * **Option A:** True. The **right lobe** is the most common site (approx. 75-80%) because it receives the bulk of portal blood flow, which carries the hexacanth embryos from the intestine. * **Option C:** True. Most cysts are slow-growing and remain **asymptomatic** for years. They are often discovered incidentally on imaging or only become symptomatic when they cause mass effect, rupture, or secondary infection. * **Option D:** True. **Echinococcus granulosus** is the most common causative organism (cystic echinococcosis), whereas *E. multilocularis* causes the rarer, more aggressive alveolar echinococcosis. **Clinical Pearls for NEET-PG:** * **Imaging Gold Standard:** USG is the first-line investigation (Gharbi Classification). CT scan is best for detecting **daughter cysts** and "water lily sign" (detached endocyst). * **Serology:** ELISA is the most sensitive screening test. * **Medical Management:** **Albendazole** is the drug of choice, often started pre-operatively to reduce cyst tension and prevent secondary hydatidosis. * **Scolicidal Agents:** Hypertonic saline (20%), silver nitrate, or cetrimide are used to kill protoscolices during surgery. **Formalin is no longer used** due to the risk of sclerosing cholangitis. * **PAIR:** (Puncture, Aspiration, Injection, Re-aspiration) is contraindicated for superficial or biliary-communicating cysts.

Question 47: Which of the following is a selective shunt?

A. Proximal splenorenal shunt
B. Warren shunt (Correct Answer)
C. Side-to-side portasystemic shunt
D. Mesocaval shunt

Explanation: **Explanation:** The goal of surgical shunts in portal hypertension is to reduce portal pressure and prevent variceal bleeding. Shunts are classified into **Non-selective**, **Partial**, and **Selective**. **1. Why the Correct Answer is Right:** The **Warren shunt (Distal Splenorenal Shunt)** is the classic example of a **selective shunt**. It involves anastomosing the distal end of the splenic vein to the left renal vein while ligating the short gastric and gastroepiploic veins. This selectively decompresses the gastroesophageal varices (the "gastrosplenic circuit") while maintaining high-pressure portal venous flow to the liver (prograde flow). This preservation of portal perfusion significantly reduces the risk of hepatic encephalopathy compared to non-selective shunts. **2. Why the Incorrect Options are Wrong:** * **Proximal Splenorenal Shunt (Linton Shunt):** This is a **non-selective shunt**. It involves a splenectomy and anastomosing the proximal end of the splenic vein to the renal vein. Because the entire portal system is decompressed, it diverts blood away from the liver. * **Side-to-side Portasystemic Shunt:** This is a **non-selective shunt**. It connects the portal vein directly to the inferior vena cava (IVC). It is highly effective at reducing pressure but carries a high risk of encephalopathy. * **Mesocaval Shunt:** This is a **non-selective shunt** (unless a small-diameter prosthetic graft is used, making it "partial"). It connects the superior mesenteric vein to the IVC. **Clinical Pearls for NEET-PG:** * **Warren Shunt Contraindication:** It should not be performed in patients with **ascites**, as it does not decompress the mesenteric venous system, potentially worsening the ascites. * **TIPS (Transjugular Intrahepatic Portosystemic Shunt):** Functionally acts as a side-to-side (non-selective) shunt. * **Most common complication** of non-selective shunts: Hepatic Encephalopathy.

Question 48: According to Child-Pugh criteria, what does the presence of hepatic encephalopathy, a bilirubin level of 2.5 mg/dL, an albumin level of 3 gm/dL, and controlled ascites indicate?

A. Grade A
B. Grade B (Correct Answer)
C. Grade C
D. More information needed

Explanation: The **Child-Pugh Score** (or Child-Turcotte-Pugh) is a vital clinical tool used to assess the prognosis of chronic liver disease and cirrhosis. It evaluates five parameters: Bilirubin, Albumin, PT/INR, Ascites, and Encephalopathy [1]. ### **Step-by-Step Scoring for the Question:** 1. **Encephalopathy:** Presence (Grade 1-2) = **2 points**. 2. **Bilirubin (2.5 mg/dL):** Range 2–3 mg/dL = **2 points**. 3. **Albumin (3.0 gm/dL):** Range 2.8–3.5 gm/dL = **2 points**. 4. **Ascites:** Controlled (Slight/Mild) = **2 points**. 5. **PT/INR:** Not provided, but assuming a baseline of 1 point (normal). **Total Score:** 2 + 2 + 2 + 2 + 1 = **9 points**. ### **Classification:** * **Grade A (5–6 points):** Well-compensated disease. * **Grade B (7–9 points):** Significant functional impairment. **(Correct Answer)** * **Grade C (10–15 points):** Decompensated disease. ### **Why Other Options are Wrong:** * **Option A (Grade A):** Requires a score of 5–6. The patient already exceeds this due to the presence of encephalopathy and elevated bilirubin. * **Option B (Grade C):** Requires a score of 10 or more. This patient’s parameters are moderately deranged but not yet at the severe threshold. * **Option D:** While INR is missing, the four provided parameters already sum to 8 points, placing the patient firmly in Grade B regardless of whether the INR is 1 or 2 points. ### **High-Yield NEET-PG Pearls:** * **Mnemonic for Parameters:** **"ABCDE"** (**A**lbumin, **B**ilirubin, **C**oagulation [INR], **D**istension [Ascites], **E**ncephalopathy). * **Surgical Significance:** Grade A patients are generally safe for major surgery; Grade B requires caution; Grade C is a contraindication for non-transplant surgery. * **Bilirubin Exception:** In Primary Biliary Cholangitis (PBC), the bilirubin cut-offs are higher (1–4 mg/dL for 2 points; >10 mg/dL for 3 points).

Question 49: All of the following are true about brown pigment gall stones except?

A. They may occur due to infection with E. coli.
B. More common in Western countries. (Correct Answer)
C. May be associated with Clonorchis sinensis infestation.
D. They are composed of calcium salts of unconjugated bilirubin with varying amounts of cholesterol and protein.

Explanation: **Explanation:** Brown pigment stones are a specific subtype of gallstones primarily associated with **stasis and infection** within the biliary tree. **1. Why Option B is the correct answer (The False Statement):** Brown pigment stones are **more common in Asian countries** (the East) rather than Western countries. In Western populations, cholesterol stones are the most prevalent (approx. 80%), followed by black pigment stones (associated with hemolysis). Brown stones are typically "primary" stones, meaning they often form within the bile ducts (CBD) rather than the gallbladder, especially in the context of parasitic infections or biliary stasis common in Southeast Asia. **2. Analysis of other options:** * **Option A (E. coli):** True. Bacterial infection is a hallmark of brown stone formation. Bacteria like *E. coli* and *Klebsiella* produce the enzyme **beta-glucuronidase**, which deconjugates bilirubin diglucuronide into free unconjugated bilirubin, leading to precipitation. * **Option C (Clonorchis sinensis):** True. Parasitic infestations (e.g., *Clonorchis sinensis*, *Ascaris lumbricoides*) cause chronic inflammation and ductal stasis, providing a nidus for brown stone formation. * **Option D (Composition):** True. They consist of **calcium bilirubinate** (unconjugated), calcium palmitate, and cholesterol. Unlike black stones, they have a higher proportion of cholesterol and protein. **Clinical Pearls for NEET-PG:** * **Location:** Brown stones are usually **primary CBD stones**; Black stones are usually **gallbladder stones**. * **Radiology:** Brown stones are typically **radiolucent** (unlike 10-20% of cholesterol stones or many black stones which may be radiopaque). * **Texture:** They are soft, greasy, and earthy in consistency. * **Key Enzyme:** **Beta-glucuronidase** is the most important factor in their pathogenesis.

Question 50: What is the investigation of choice in obstructive jaundice?

A. ERCP
B. USG (Correct Answer)
C. Cholecystography
D. Laparoscopy

Explanation: **Explanation:** In the diagnostic workup of obstructive jaundice, **Ultrasonography (USG)** is the **initial investigation of choice**. Its primary role is to differentiate between medical (intrahepatic) and surgical (extrahepatic) jaundice. USG is highly sensitive in detecting **biliary radical dilatation** (the hallmark of obstruction), identifying the level of obstruction, and detecting gallstones or pancreatic masses. It is preferred because it is non-invasive, radiation-free, inexpensive, and widely available. **Analysis of Options:** * **ERCP (Endoscopic Retrograde Cholangiopancreatography):** While ERCP was once the gold standard, it is now primarily a **therapeutic** tool (for stenting or stone extraction). It is invasive and carries risks like pancreatitis. **MRCP** has replaced it as the diagnostic gold standard for visualizing the biliary tree. * **Cholecystography:** This is an obsolete investigation. It requires a functioning gallbladder to concentrate dye and is ineffective in the presence of jaundice (bilirubin >2 mg/dL), as the liver cannot excrete the contrast. * **Laparoscopy:** This is an invasive surgical procedure. While it can be used for staging malignancies (Diagnostic Laparoscopy), it is never the first-line investigation for jaundice. **High-Yield Clinical Pearls for NEET-PG:** * **Initial Investigation:** USG Abdomen. * **Gold Standard (Diagnostic):** MRCP (Non-invasive, visualizes the entire biliary tree). * **Gold Standard (Therapeutic):** ERCP. * **Best for Distal CBD/Periampullary lesions:** Endoscopic Ultrasound (EUS). * **Courvoisier’s Law:** In a patient with obstructive jaundice, if the gallbladder is palpable, the obstruction is likely due to malignancy (e.g., Periampullary CA) rather than stones, as stone disease causes a fibrosed, non-distensible gallbladder.

Practice by Chapter

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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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Biliary Tract Tumors

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ERCP and Its Complications

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