Hepatobiliary Surgery Practice Questions

Q: Which cell count increases earliest following splenectomy?

Platelets. The spleen acts as the primary reservoir for blood cells, particularly platelets. Approximately **one-third (30%) of the total body platelet pool** is sequestered within the splenic red pulp at any given time. **Why Platelets are the correct answer:** Immediately following a splenectomy, the sequestration site is removed, leading to a rapid redistribution of these stored platelets into the systemic circulation. This results in an increase in platelet count within **hours** of the procedure. This transient reactive thrombocytosis usually peaks between 7–10 days post-surgery. **Analysis of Incorrect Options:** * **Neutrophils:** While a transient neutrophilic leukocytosis occurs post-splenectomy (due to demargination and stress response), it is generally less pronounced and less immediate than the redistribution of the sequestered platelet pool. * **Lymphocytes & Monocytes:** These cells may show a mild, chronic increase (lymphocytosis and monocytosis) as the spleen is a major lymphoid organ, but these changes occur much later and are not the earliest hematological finding. **High-Yield Clinical Pearls for NEET-PG:** 1. **Post-Splenectomy Blood Picture:** Look for **Howell-Jolly bodies** (nuclear remnants), **Pappenheimer bodies** (iron granules), **Heinz bodies** (denatured hemoglobin), and **Target cells**. 2. **Infections:** Patients are at lifelong risk of **OPSI (Overwhelming Post-Splenectomy Infection)**, primarily from encapsulated organisms: *Streptococcus pneumoniae* (most common), *Haemophilus influenzae*, and *Neisseria meningitidis*. 3. **Vaccination Protocol:** Ideally, vaccines should be administered **2 weeks before** elective surgery or **2 weeks after** emergency surgery to ensure optimal immune response.

Q: Which of the following is NOT a risk factor for developing cholangiocarcinoma?

Working in the rubber industry. **Explanation:** Cholangiocarcinoma (CCA) is a malignancy arising from the biliary epithelium [1]. The primary pathophysiology involves **chronic inflammation** and cholestasis, which lead to DNA damage and malignant transformation of cholangiocytes. **Why Option D is the Correct Answer:** Working in the **rubber industry** is a well-established risk factor for **Bladder Cancer** (due to exposure to aromatic amines like benzidine) and certain leukemias, but it is **not** associated with cholangiocarcinoma. In contrast, the chemical industry exposure specifically linked to cholangiocarcinoma is the **aircraft and PVC industry** (exposure to 1,2-dichloropropane and dichloromethane). **Analysis of Incorrect Options:** * **Choledochal Cyst (Option A):** These congenital cystic dilatations of the bile duct cause bile stasis and chronic inflammation. The risk of malignancy is as high as 10-15%, necessitating surgical excision. * **Cholelithiasis (Option B):** While gallstones are primarily a risk factor for **Gallbladder Cancer**, large or long-standing stones in the biliary tree (especially hepatolithiasis/intrahepatic stones) cause chronic mucosal irritation, significantly increasing the risk of cholangiocarcinoma [1]. * **Liver Flukes (Option C):** Infection with *Opisthorchis viverrini* and *Clonorchis sinensis* (common in SE Asia) is a classic, high-yield risk factor. These parasites reside in the bile ducts, causing chronic mechanical injury and inflammation [1]. **NEET-PG High-Yield Pearls:** * **Most common risk factor (Worldwide):** Primary Sclerosing Cholangitis (PSC). * **Tumor Marker:** CA 19-9 is commonly elevated (also seen in pancreatic cancer). * **Klatskin Tumor:** A hilar cholangiocarcinoma occurring at the confluence of the right and left hepatic ducts [1]. * **Thorotrast:** A historical radiocontrast agent strongly linked to both cholangiocarcinoma and hepatic angiosarcoma.

Q: Which of the following is a selective shunt?

Warren shunt. **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.

Q: Most faceted gallstones are formed in which organ?

Gallbladder. **Explanation:** The correct answer is **Gallbladder (Option B)**. Faceted gallstones are a characteristic feature of **mixed gallstones**, which are the most common type of gallstones. These stones form when multiple stones are present within the confined space of the gallbladder. As the gallbladder contracts, the stones are pressed against one another; this constant mechanical friction and pressure lead to the development of flat surfaces or "facets" on the stones. **Analysis of Options:** * **Liver (Option A):** While intrahepatic stones (hepatolithiasis) can occur, they are usually primary pigment stones formed due to stasis or infection and are typically not faceted. * **Common Bile Duct (Option C):** Stones found here (choledocholithiasis) are either secondary stones that migrated from the gallbladder or primary stones formed in the duct. Primary CBD stones are usually ovoid or "earthy" (crumbly) and lack the multiple-contact friction required to create facets. * **Spiral valves of Heister (Option D):** These are mucosal folds in the cystic duct. While they can trap small stones, they are a site of obstruction rather than a primary site for the formation and maturation of faceted stones. **Clinical Pearls for NEET-PG:** * **Mixed Stones:** The most common type (75-80%), containing cholesterol, bile pigments, and calcium salts. They are almost always multiple and faceted. * **Pure Cholesterol Stones:** Usually solitary, large, and non-faceted (egg-shaped). * **Black Pigment Stones:** Associated with chronic hemolysis (e.g., Thalassemia, Hereditary Spherocytosis) and are usually found in the gallbladder. * **Brown Pigment Stones:** Associated with biliary stasis and infection (*E. coli*, *Clonorchis sinensis*); typically formed in the bile ducts.

Q: What is true about carcinoma of the gallbladder?

Ninety percent are associated with gallstones. **Explanation:** Carcinoma of the gallbladder (GBC) is the most common biliary tract malignancy and is characterized by a strong association with chronic inflammation. **1. Why Option B is correct:** Gallstones (cholelithiasis) are the most significant risk factor for GBC. Approximately **70% to 90% of patients** with gallbladder cancer have concomitant gallstones. The risk increases with stone size (especially >3 cm) and the duration of the disease, as chronic mucosal irritation leads to dysplasia and eventual malignant transformation. **2. Why other options are incorrect:** * **Option A:** The most common presentation is **vague abdominal pain** (similar to biliary colic or cholecystitis). Obstructive jaundice occurs in late stages when the tumor invades the common bile duct or hepatoduodenal ligament, signifying poor prognosis. * **Option C:** The 5-year survival rate is notoriously poor, generally **less than 5-10%**. Most cases are diagnosed at an advanced stage (Stage III or IV) due to the lack of early specific symptoms. * **Option D:** Approximately **90% of GBCs are Adenocarcinomas**. Squamous cell carcinoma is rare, accounting for only about 2-5% of cases. **Clinical Pearls for NEET-PG:** * **Porcelain Gallbladder:** Intramural calcification of the gallbladder wall; it carries a high risk of malignancy (up to 25%) and is an absolute indication for cholecystectomy. * **Nevin Staging vs. TNM:** While TNM is standard, Nevin staging is often tested (Stage I: Intramucosal; Stage V: Distant metastasis/Liver involvement). * **Treatment:** For T1a (confined to lamina propria), simple cholecystectomy is sufficient. For T1b and beyond, **Radical Cholecystectomy** (cholecystectomy + wedge resection of liver bed + lymphadenectomy) is required.

Question 1

What condition is associated with Boa's sign?

Accepted Answer

Acute cholecystitis

Answer

Acute cholangitis

Answer

Mirizzi syndrome

Answer

Primary sclerosing cholangitis

Question 2

Which of the following is an exception to Courvoisier's law?

Accepted Answer

Primary oriental cholangiohepatitis causing stones in the CBD

Answer

Cancer of the ampulla

Answer

Cancer of the pancreas

Answer

Cancer of the bile duct

Question 3

Which cell count increases earliest following splenectomy?

Accepted Answer

Platelets

Answer

Lymphocytes

Answer

Monocytes

Answer

Neutrophils

Question 4

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

Accepted Answer

Atrophy of one lobe with ipsilateral involvement of secondary biliary radicals

Answer

Hepatic duct involvement up to secondary radicals bilaterally

Answer

Encasement or occlusion of main portal vein proximal to its bifurcation

Answer

Atrophy of one lobe with encasement of contralateral portal vein branch

Question 5

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

Accepted Answer

Hepatic resection is never performed

Answer

Most commonly located in the right lobe of the liver

Answer

Mostly asymptomatic

Answer

The most common causative organism is Echinococcus granulosus

Question 6

Post-splenectomy, which of the following infections is not common?

Accepted Answer

Disseminated herpes zoster

Answer

Pneumococcus

Answer

H. influenzae

Answer

Salmonella

Question 7

Which of the following is NOT a risk factor for developing cholangiocarcinoma?

Accepted Answer

Working in the rubber industry

Answer

Choledochal cyst

Answer

Cholelithiasis

Answer

Liver flukes

Question 8

Which of the following is a selective shunt?

Accepted Answer

Warren shunt

Answer

Proximal splenorenal shunt

Answer

Side-to-side portasystemic shunt

Answer

Mesocaval shunt

Question 9

Most faceted gallstones are formed in which organ?

Accepted Answer

Gallbladder

Answer

Liver

Answer

Common bile duct

Answer

Spiral valves of Heister

Question 10

What is true about carcinoma of the gallbladder?

Accepted Answer

Ninety percent are associated with gallstones

Answer

Most commonly presents with obstructive jaundice

Answer

The 5-year survival rate is 35%

Answer

Thirty percent are squamous cell carcinoma

Hepatobiliary Surgery — MCQs

Hepatobiliary Surgery — MCQs

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