Liver and Biliary Pathology Practice Questions

Q: Brown type gallstones are formed due to:

Chronic biliary infection. **Explanation:** Gallstones are broadly classified into cholesterol stones and pigment stones. Pigment stones are further divided into **Black** and **Brown** types based on their pathogenesis and composition. **Why Option C is Correct:** **Brown pigment stones** are primarily formed within the bile ducts (primary CBD stones) as a result of **chronic biliary infection** and stasis. The underlying mechanism involves bacteria (like *E. coli* and *Klebsiella*) producing the enzyme **β-glucuronidase**. This enzyme deconjugates bilirubin diglucuronide into free unconjugated bilirubin, which then precipitates with calcium to form **calcium bilirubinate**. These stones are soft, greasy, and often associated with biliary parasites (e.g., *Clonorchis sinensis*). **Why Other Options are Incorrect:** * **A. Hypercholesterolemia:** This leads to the formation of **Cholesterol stones** (pale yellow/green) due to the supersaturation of bile with cholesterol. * **B. Long standing hemolysis:** This is the classic cause of **Black pigment stones**. Increased breakdown of hemoglobin leads to an excess of unconjugated bilirubin in the gallbladder, which polymerizes into hard, small, black stones. * **D. Drugs:** Certain drugs like Clofibrate or Ceftriaxone can increase the risk of stone formation, but they are not the primary cause of brown pigment stones. **High-Yield Clinical Pearls for NEET-PG:** * **Black Stones:** Found in the **gallbladder**; associated with hemolysis (Spherocytosis, Sickle cell) and Cirrhosis; Radiopaque in 50% of cases. * **Brown Stones:** Found in the **bile ducts**; associated with infection/stasis; usually Radiolucent. * **Mixed Stones:** The most common type of gallstone (75-80%), containing both cholesterol and pigment. * **Charcot’s Triad:** Fever, Jaundice, and RUQ pain—often seen when brown stones cause ascending cholangitis.

Q: Which of the following can be associated with fatty liver, except?

Chlorpropamide. The correct answer is **Chlorpropamide**. Fatty liver, or Steatosis, occurs when lipid accumulation (primarily triglycerides) exceeds the liver's capacity for export or metabolism. This is a common manifestation of drug-induced liver injury (DILI). **Why Chlorpropamide is the correct answer:** Chlorpropamide is a first-generation sulfonylurea used in the treatment of Type 2 Diabetes. Its primary hepatic side effect is **cholestatic jaundice** (due to hypersensitivity or canalicular injury), not steatosis. In fact, by improving glycemic control, it may indirectly reduce metabolic-associated fatty liver disease (MAFLD). **Analysis of Incorrect Options:** * **Amiodarone:** This anti-arrhythmic drug is a classic cause of **macrovesicular steatosis** and "pseudo-alcoholic" hepatitis [1]. It inhibits mitochondrial beta-oxidation and can lead to the formation of Mallory-Denk bodies. * **Zidovudine (AZT):** As a Nucleoside Reverse Transcriptase Inhibitor (NRTI), it causes mitochondrial toxicity by inhibiting DNA polymerase-gamma. This leads to **microvesicular steatosis** and potentially fatal lactic acidosis. * **Sodium Valproate:** This anticonvulsant interferes with mitochondrial fatty acid metabolism (beta-oxidation) [1]. It typically causes **microvesicular steatosis**, especially in children or those with underlying metabolic urea cycle disorders [1]. **High-Yield Clinical Pearls for NEET-PG:** * **Microvesicular Steatosis (High Yield):** Remember the mnemonic **"SAVA"** — **S**alicylates (Reye’s Syndrome), **A**cute Fatty Liver of Pregnancy, **V**alproate, and **A**nti-retrovirals (NRTIs). * **Macrovesicular Steatosis:** Most commonly caused by Alcohol, Obesity, Diabetes, and drugs like **Corticosteroids**, **Amiodarone**, and **Methotrexate** [1]. * **Tetracyclines:** High-dose IV tetracycline is another classic cause of microvesicular steatosis [1].

Question 1

Brown type gallstones are formed due to:

Accepted Answer

Chronic biliary infection

Answer

Hypercholesterolemia

Answer

Long standing hemolysis

Answer

Drugs

Question 2

Gallbladder stone formation is influenced by which of the following?

Accepted Answer

Hypercholesterolemia

Answer

Clofibrate therapy

Answer

Hyperalimentation

Answer

Primary biliary cirrhosis

Question 3

Which of the following is a risk factor for cholangiocarcinoma?

Accepted Answer

Opisthorchis sinensis infection

Answer

Obesity

Answer

Salmonella carrier state

Answer

HBV infection

Question 4

Mallory's hyaline is seen in which of the following conditions?

Accepted Answer

Indian childhood cirrhosis

Answer

Hepatitis C infection

Answer

Amoebic liver abscess

Answer

Autoimmune hepatitis

Question 5

Peripoal fibrosis is caused by which of the following agents?

Accepted Answer

Methotrexate

Answer

Phenytoin

Answer

Thorotrast

Answer

Halothane

Question 6

Which of the following pigments accumulates in the liver in Dubin-Johnson syndrome?

Accepted Answer

Epinephrine metabolite

Answer

Monoglucuronate bilirubin

Answer

Bilirubin pigment

Answer

Melanotic pigment

Question 7

Which of the following can be associated with fatty liver, except?

Accepted Answer

Chlorpropamide

Answer

Amiodarone

Answer

Zidovudine

Answer

Sodium valproate

Question 8

Which of the following is NOT true about Fibrolamellar carcinoma of the liver?

Accepted Answer

Serum AFP levels are usually >1000 ng/mL.

Answer

It has an increased incidence in females compared to males.

Answer

It generally has a good prognosis.

Answer

It is not associated with liver cirrhosis.

Question 9

Which of the following statements are true about alpha-1-antitrypsin deficiency?

Accepted Answer

Emphysema, Fibrosis of portal tract, Diastase resistant positive hepatocytes

Answer

Autosomal dominant disease, Emphysema, Fibrosis of portal tract

Answer

Autosomal dominant disease, Fibrosis of portal tract, Diastase resistant positive hepatocytes

Answer

Emphysema, Diastase resistant positive hepatocytes

Question 10

In post-hepatic jaundice, the concentration of conjugated bilirubin in the blood is higher than that of unconjugated bilirubin because:

Accepted Answer

The conjugation process of bilirubin in the liver remains operative without any interference.

Answer

There is an increased rate of destruction of red blood cells.

Answer

The unconjugated bilirubin is trapped by the bile stone produced in the bile duct.

Answer

The UDP-glucuronosyltransferase activity is increased manifold in obstructive jaundice.

Liver and Biliary Pathology — MCQs

Liver and Biliary Pathology — MCQs

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