Hepatobiliary Surgery Practice Questions

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.

Q: A patient underwent laparoscopic cholecystectomy. Histopathology revealed T2 stage. What is the next line of treatment?

Extended cholecystectomy. **Explanation:** The management of incidental gallbladder cancer (GBC) discovered after laparoscopic cholecystectomy is determined by the pathological T-stage. **Why Extended Cholecystectomy is Correct:** For **T2 tumors** (invasion into the perimuscular connective tissue), simple cholecystectomy is inadequate due to a high risk of lymph node metastasis (30-40%) and residual disease in the liver bed. **Extended (Radical) Cholecystectomy** is the standard of care. It involves: 1. **Liver Resection:** Wedge resection of the gallbladder fossa (Segments IVb and V) to ensure negative margins. 2. **Lymphadenectomy:** Systematic dissection of cystic, pericholedochal, and portal vein lymph nodes (N1 station). **Why Other Options are Incorrect:** * **Observation:** Only appropriate for **T1a** tumors (limited to the mucosa), where simple cholecystectomy is curative. * **Port site excision:** Previously thought to prevent recurrence, current evidence and guidelines (NCCN) show it does not improve survival or decrease peritoneal recurrence; hence, it is no longer routinely recommended. * **Chemotherapy:** While adjuvant chemotherapy (e.g., Capecitabine) may be used post-operatively, it is not a substitute for definitive surgical clearance in resectable T2 disease. **Clinical Pearls for NEET-PG:** * **T1a:** Simple Cholecystectomy is sufficient. * **T1b, T2, T3:** Require Extended Cholecystectomy. * **Most common site of metastasis:** Liver (Direct spread) and Lymph nodes. * **Most common histological type:** Adenocarcinoma. * If T2 is found, the first step before re-exploration is often a **staging CT/PET-CT** to rule out distant metastasis.

Q: Identify the type of gallstone shown below.

Cholesterol stone. ***Cholesterol stone*** - Appears **yellow-green** in color with a **smooth, round surface** and shows **radiating crystalline pattern** on cut section. - Contains **>70% cholesterol** and is typically **large, solitary**, associated with **obesity**, **female gender**, and **rapid weight loss**. *Mixed stone* - Contains **20-70% cholesterol** mixed with **calcium bilirubinate** and appears **brown to black** with **faceted surfaces**. - Multiple stones are usually present with **laminated appearance** on cut section, often associated with **gallbladder stasis**. *Brown pigment stone* - **Brown, soft, and crumbly** stones containing **calcium bilirubinate** and **bacterial debris** from **E. coli** or **Klebsiella**. - Typically found in **bile ducts** rather than gallbladder, associated with **biliary tract infections** and **parasitic infestations**. *Black pigment stone* - **Hard, black, spiculated** stones composed of **calcium bilirubinate** and **mucin glycoproteins**. - Associated with **hemolytic conditions** like **sickle cell disease** and **cirrhosis**, typically **small and multiple**.

Question 1

Most faceted gallstones are formed in which organ?

Accepted Answer

Gallbladder

Answer

Liver

Answer

Common bile duct

Answer

Spiral valves of Heister

Question 2

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

Question 3

Which of the following statements about gall stones is TRUE?

Accepted Answer

More common in females between 30-40 years of age.

Answer

Lithogenic bile is required for stone formation.

Answer

May be associated with carcinoma of the gallbladder.

Answer

Associated with diabetes mellitus.

Question 4

A patient underwent laparoscopic cholecystectomy. Histopathology revealed T2 stage. What is the next line of treatment?

Accepted Answer

Extended cholecystectomy

Answer

Observation

Answer

Port site excision

Answer

Chemotherapy

Question 5

Intraoperative cholangiography is indicated in which of the following conditions?

Accepted Answer

High lipase level

Answer

Cholangitis

Answer

Periampullary carcinoma

Answer

Large gallstones

Question 6

Identify the type of gallstone shown below.

Accepted Answer

Cholesterol stone

Answer

Mixed stone

Answer

Brown pigment stone

Answer

Black pigment stone

Question 7

Which statement is true regarding hemobilia?

Accepted Answer

Characterized by the triad of jaundice, abdominal pain, and melena.

Answer

The most common cause is rupture of a portal vein into the biliary system.

Answer

Magnetic Resonance (MR) angiography is the investigation of choice (IOC).

Answer

None of the above statements are true.

Question 8

Surgical lobes of the liver are divided on the basis of which vascular structures?

Accepted Answer

Hepatic vein

Answer

Hepatic artery

Answer

Bile ducts

Answer

Central veins

Question 9

Biliary stricture developing after laparoscopic cholecystectomy usually occurs at which part of the common bile duct?

Accepted Answer

Upper

Answer

Middle

Answer

Lower

Answer

All with equal frequency

Question 10

What is Type II Mirizzi's syndrome characterized by?

Accepted Answer

Erosion of one-third of the circumference of the common duct.

Answer

Obstruction of the common duct by external compression only, without erosion.

Answer

Erosion of up to two-thirds of the circumference of the common duct.

Answer

Total or near-total circumferential erosion of the common duct.

Hepatobiliary Surgery — MCQs

Hepatobiliary Surgery — MCQs

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