Liver and Biliary Pathology Practice Questions

Q: Hepar lobatum is due to:

Syphilis. **Explanation:** **Hepar lobatum** is a classic morphological manifestation of **Tertiary Syphilis** [1]. It occurs due to the formation and subsequent healing of multiple **gummas** (granulomatous lesions) within the liver. As these gummas heal, they undergo extensive fibrosis and scarring. The resulting deep, radiating fibrous scars contract, dividing the liver into irregular, prominent lobes, giving it a characteristic "botryoid" (cluster of grapes) or coarsely lobulated appearance. **Analysis of Options:** * **Option B (Syphilis):** Correct. The cicatrization (scarring) of hepatic gummas in late-stage syphilis is the specific cause of the lobulated "Hepar lobatum" deformity. * **Option A & C (Hepatitis A & B):** Incorrect. Viral hepatitis typically causes diffuse inflammation. While chronic Hepatitis B can lead to cirrhosis (characterized by regenerative nodules and diffuse fibrosis), it does not produce the deep, coarse, lobulated scars seen in Hepar lobatum. * **Option D (Biliary atresia):** Incorrect. This is a neonatal condition characterized by the obstruction of the extrahepatic biliary tree, leading to secondary biliary cirrhosis and cholestasis, not gummatous lobulation. **High-Yield Pearls for NEET-PG:** * **Gumma:** The hallmark of tertiary syphilis [1]; a form of coagulative necrosis with a rubbery consistency. * **Microscopy:** Gummas show a central zone of necrosis surrounded by mononuclear cells (plasma cells, lymphocytes) and a peripheral rim of fibroblasts. * **Arterial involvement:** Syphilis is often associated with **endarteritis obliterans** (narrowing of small arteries due to intimal proliferation) [1]. * **Other Hepatic Syphilis:** Congenital syphilis presents differently, often showing diffuse interstitial fibrosis (pericellular fibrosis) known as **"Flint liver."** **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Infectious Diseases, pp. 388-389.

Q: Alpha-1 antitrypsin deficiency is characterized by the deposition of cytoplasmic inclusions that are:

All of the above. **Explanation:** Alpha-1 antitrypsin (A1AT) deficiency is a genetic disorder characterized by the misfolding of the A1AT protein (most commonly the **PiZ variant**). This misfolded protein cannot be secreted by hepatocytes, leading to its accumulation within the endoplasmic reticulum [1]. **Why "All of the above" is correct:** * **Eosinophilic:** On standard H&E staining, these accumulated proteins appear as distinct, round-to-oval **eosinophilic (pinkish)** hyaline globules within the cytoplasm of hepatocytes, particularly in the periportal regions [1]. * **PAS Positive:** These inclusions are composed of glycoproteins. The Periodic Acid-Schiff (PAS) stain reacts with the carbohydrate moieties of the misfolded protein, staining the globules a deep magenta/purple. * **Diastase Resistant:** This is the most characteristic feature. While glycogen is also PAS-positive, it is digested by the enzyme diastase. Since A1AT globules are proteins and not glycogen, they remain visible after diastase treatment (**PAS-D positive**). **Clinical Pearls for NEET-PG:** * **Genetics:** Autosomal codominant inheritance; the **PiZZ phenotype** carries the highest risk for both panacinar emphysema (lungs) and cirrhosis (liver) [1], [2]. * **Morphology:** The globules are most prominent in **periportal hepatocytes** (Zone 1). * **Diagnosis:** Gold standard is isoelectric focusing for phenotype identification. * **Associated Pathology:** It is the most common genetic cause of liver disease in children and is associated with an increased risk of **Hepatocellular Carcinoma (HCC)** even in the absence of cirrhosis. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 856-858. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Lung, pp. 684-685.

Q: A liver biopsy in a patient with malaria will show which of the following histological findings?

Kupffer cell hyperplasia. **Explanation:** In malaria, the liver is a primary site of involvement during the exo-erythrocytic phase. The characteristic histological finding is **Kupffer cell hyperplasia** [1]. As the malaria parasite (Plasmodium) infects and ruptures red blood cells, it releases hemoglobin breakdown products and **hemozoin pigment** (malarial pigment). The Kupffer cells, which are the resident macrophages of the liver, proliferate and become heavily engorged as they phagocytose these pigments and cellular debris [1]. This often gives the liver a slate-gray or "dusky" macroscopic appearance [1]. **Analysis of Incorrect Options:** * **A. Microabscesses:** These are typically seen in pyogenic liver abscesses or systemic bacterial infections (e.g., *Staphylococcus aureus* or *E. coli*), not protozoal infections like malaria. * **C. Piecemeal necrosis (Interface Hepatitis):** This is the hallmark of Chronic Active Hepatitis (especially Hepatitis B and C), where inflammation spills over from the portal tracts into the adjacent parenchyma. * **D. Non-caseating granuloma:** These are characteristic of Sarcoidosis, Tuberculosis (though TB is usually caseating), or drug-induced liver injury. **High-Yield NEET-PG Pearls:** * **Malarial Pigment:** Hemozoin is an iron-containing pigment but is **Prussian Blue negative** (unlike hemosiderin), as the iron is sequestered in a crystalline form. * **Liver Involvement:** While the liver is enlarged (hepatomegaly), true "hepatitis" with significant transaminase elevation is rare in malaria; the pathology is primarily reticuloendothelial [1]. * **Other Organs:** Similar pigment deposition and macrophage hyperplasia are seen in the **spleen** (leading to "Big Spleen Disease" or Tropical Splenomegaly Syndrome) and bone marrow [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Infectious Diseases, p. 400.

Question 1

Budd-Chiari syndrome is due to thrombosis of which of the following structures?

Accepted Answer

Hepatic veins

Answer

Infrarenal Inferior Vena Cava

Answer

Renal veins of Inferior Vena Cava

Answer

Superior mesenteric vein

Question 2

Which of the following statements about hepatic adenoma is false?

Accepted Answer

Most cases are asymptomatic

Answer

More common in females

Answer

Rupture risk is increased in pregnancy

Answer

Low risk for transforming into malignancy

Question 3

Ingestion of arsenic causes which of the following?

Accepted Answer

Noncirrhotic portal fibrosis

Answer

Hepatic carcinoma

Answer

Hepatic adenoma

Answer

Hepatic cirrhosis

Question 4

Hepar lobatum is due to:

Accepted Answer

Syphilis

Answer

Hepatitis A

Answer

Hepatitis B

Answer

Biliary atresia

Question 5

What is the major source of collagen in cirrhosis?

Accepted Answer

Ito cell (Hepatic stellate cell)

Answer

Kupffer cells

Answer

Hepatocyte

Answer

Canalicular cell

Question 6

Alpha-1 antitrypsin deficiency is characterized by the deposition of cytoplasmic inclusions that are:

Accepted Answer

All of the above

Answer

Eosinophilic

Answer

PAS positive

Answer

Diastase resistant

Question 7

Which of the following is NOT a predisposing factor for cholangiocarcinoma?

Accepted Answer

Cholelithiasis

Answer

Asiatic cholangiohepatitis

Answer

Ulcerative colitis

Answer

Choledochal cyst

Question 8

What is the most common malignancy of the gallbladder?

Accepted Answer

Adenocarcinoma

Answer

Squamous cell carcinoma

Answer

Mucinous cystadenoma

Answer

Serous cystadenoma

Question 9

A liver biopsy in a patient with malaria will show which of the following histological findings?

Accepted Answer

Kupffer cell hyperplasia

Answer

Microabscesses

Answer

Piecemeal necrosis

Answer

Non-caseating granuloma

Question 10

Hemosiderosis of the liver is characterized by the deposition of which pigment?

Accepted Answer

Iron

Answer

Copper

Answer

Zinc

Answer

Manganese

Liver and Biliary Pathology — MCQs

Liver and Biliary Pathology — MCQs

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