Viral Hepatitis — MCQs
Co-infection is essential for disease presentation in:
Which of the following is NOT a characteristic of hepatitis B infection?
To determine the endemicity of hepatitis B, what should be measured?
Which of the following is a histopathological feature of extrahepatic biliary atresia?
Liver biopsy shows ground-glass hepatocytes on H&E and positive viral antigens on immunostaining. Which virus?
A liver biopsy shows 'ground glass' hepatocytes. Which special stain would best demonstrate viral particles?
Mallory bodies are typically seen in all of the following conditions except:
A liver biopsy shows 'nutmeg' pattern. Which additional finding would best support chronic passive congestion?
A liver biopsy shows 'nutmeg' pattern. Which additional finding would best support chronic passive congestion?
Which of the following liver tumors has a propensity to invade the portal or hepatic vein?
Viral Hepatitis Indian Medical PG Practice Questions and MCQs
Question 1: Co-infection is essential for disease presentation in:
- A. Hepatitis B
- B. Hepatitis A
- C. Non A Non B Hepatitis
- D. Delta Hepatitis (Correct Answer)
Explanation: ***Delta Hepatitis*** - **Delta hepatitis** (Hepatitis D) is a **defective RNA virus** that requires the presence of Hepatitis B surface antigen for replication and expression. - Therefore, infection with **Hepatitis D** can only occur as a co-infection or superinfection with **Hepatitis B virus (HBV)**. *Hepatitis B* - **Hepatitis B virus (HBV)** can cause acute or chronic hepatitis and does not require co-infection with another distinct virus for its disease presentation. - While it can co-infect with Hepatitis D, it is not essential for HBV itself to cause disease. *Hepatitis A* - **Hepatitis A virus (HAV)** is an RNA virus that causes acute hepatitis and is typically transmitted via the fecal-oral route. - It resolves spontaneously in most cases and does not require co-infection with another virus to manifest disease. *Non A Non B Hepatitis* - The term "Non A Non B Hepatitis" was historically used to describe hepatitis cases that were not caused by Hepatitis A or B. - This category was largely replaced by the identification of **Hepatitis C virus (HCV)**, which does not require co-infection with another virus for its disease presentation.
Question 2: Which of the following is NOT a characteristic of hepatitis B infection?
- A. HBcAg in serum indicate active infection (Correct Answer)
- B. Alpha interferon is used for the treatment of chronic infection
- C. Establishes chronic infections in those infected as infants
- D. Can cause hepatocellular carcinoma
Explanation: Hepatitis B core antigen (HBcAg) is found within the infected hepatocytes and is not secreted into the bloodstream [1]. The presence of HBcAg in serum would typically indicate a ruptured hepatocyte and damaged liver, but it is not a routine marker for active infection. Alpha interferon is a common antiviral medication used in the treatment of chronic hepatitis B infection [1]. Its mechanism of action involves modulating the immune system to clear the virus and prevent liver damage. Perinatal transmission of hepatitis B is a major route, and infants infected at birth have a high risk (up to 90%) of developing chronic hepatitis B [1]. Their immature immune systems often fail to clear the virus, leading to persistent infection. Chronic hepatitis B infection is a significant risk factor for developing hepatocellular carcinoma (HCC) [1]. The persistent inflammation and liver damage associated with chronic infection promote cellular dysplasia and malignant transformation.
Question 3: To determine the endemicity of hepatitis B, what should be measured?
- A. HBsAg (Hepatitis B surface antigen) (Correct Answer)
- B. HBcAg (Hepatitis B core antigen)
- C. HBeAg (Hepatitis B e antigen)
- D. Anti-HBeAg (Hepatitis B e antibody)
Explanation: ***HBsAg*** - **HBsAg (Hepatitis B surface antigen)** is the primary marker used to determine the **endemicity** of hepatitis B because its persistent presence indicates **chronic infection**. - A high prevalence of HBsAg in a population signifies a high burden of chronic hepatitis B infection, reflecting the endemic nature of the disease in that region. *HBcAg (Hepatitis B core antigen)* - **HBcAg** is an **intracellular antigen** and is not detectable in the serum, making it unsuitable for population-level screening or endemicity assessment. - While important for viral replication, its absence in routine blood tests means it cannot be used to gauge the prevalence of infection in a community. *HBeAg (Hepatitis B e antigen)* - **HBeAg** indicates **active viral replication** and high infectivity but is not the best marker for overall endemicity. - A positive HBeAg suggests active disease and high transmissibility in an infected individual, but not the general prevalence of chronic infection in a population. *Anti-HBeAg (Hepatitis B e antibody)* - **Anti-HBeAg** indicates a **decrease in viral replication** and a lower risk of transmission, often representing a stage of immune control. - While useful for monitoring disease progression, it is an antibody response and does not directly measure the presence of chronic infection or endemicity.
Question 4: Which of the following is a histopathological feature of extrahepatic biliary atresia?
- A. Hepatocyte ballooning degeneration
- B. Parenchymal cholestasis
- C. Marked bile duct proliferation (Correct Answer)
- D. Fibrosis of the hepatic duct
Explanation: ***Marked bile duct proliferation*** - Extrahepatic biliary atresia is characterized by the progressive obliteration of the **extrahepatic bile ducts**, leading to a compensatory **proliferation of intrahepatic bile ducts**. [1] - This proliferation is a hallmark histopathological finding, reflecting the body's attempt to establish alternative drainage pathways. [1] *Hepatocyte ballooning degeneration* - This feature is more characteristic of acute and chronic **hepatitis**, particularly alcoholic hepatitis or non-alcoholic steatohepatitis (NASH). - While it can occur in severe cholestasis due to toxin accumulation, it is not a primary or specific finding for biliary atresia. *Parenchymal cholestasis* - **Parenchymal cholestasis** refers to the accumulation of bile within the hepatocytes and bile canaliculi, which can be seen in many forms of liver disease including biliary atresia. - However, it is a general sign of impaired bile flow within the liver and not a specific diagnostic feature distinguishing biliary atresia from other cholestatic conditions. [1] *Fibrosis of the hepatic duct* - While **fibrosis** does occur in biliary atresia, it typically affects the **extrahepatic bile ducts** themselves (leading to their obliteration). - The question asks for a histopathological feature, and while fibrosis is present, **marked bile duct proliferation** within the liver parenchyma is a more specific and prominent microscopic feature used in diagnosis. [1] **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 862-864.
Question 5: Liver biopsy shows ground-glass hepatocytes on H&E and positive viral antigens on immunostaining. Which virus?
- A. Hepatitis C
- B. Hepatitis B (Correct Answer)
- C. Hepatitis E
- D. Hepatitis A
Explanation: ***Hepatitis B*** - **Ground-glass hepatocytes** are a classic histological finding in **chronic Hepatitis B infection**, representing abundant HBsAg in the endoplasmic reticulum [1]. - The presence of **viral antigens** on immunostaining further confirms the active viral replication associated with Hepatitis B [1]. *Hepatitis C* - Histological features of Hepatitis C commonly include **lymphoid aggregates**, **steatosis**, and bile duct damage, not ground-glass hepatocytes [1]. - Immunostaining for Hepatitis C viral antigens in liver tissue is not a routine diagnostic method for HCV, as **serological tests** and **viral RNA detection** are primary. *Hepatitis E* - Hepatitis E is typically an **acute infection** and does not usually lead to chronic liver disease or the characteristic ground-glass changes [1]. - Histological findings are often non-specific but may include features of acute hepatitis like **lobular inflammation** and **cholestasis**. *Hepatitis A* - Hepatitis A causes **acute hepatitis** and does not lead to chronic infection or persistent viral replication in hepatocytes [1]. - The liver biopsy in Hepatitis A typically shows diffuse **panlobular inflammation** and hepatocellular necrosis, but not ground-glass hepatocytes. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 843-845.
Question 6: A liver biopsy shows 'ground glass' hepatocytes. Which special stain would best demonstrate viral particles?
- A. PAS stain
- B. Ziehl-Neelsen stain
- C. Grocott's methenamine silver
- D. Orcein stain (Correct Answer)
Explanation: ***Orcein stain*** - **Orcein stain** specifically highlights **hepatitis B surface antigen (HBsAg)**, which accumulates in the cytoplasm of hepatocytes, producing the characteristic **ground glass appearance** [1]. - This stain helps confirm active **HBV infection** in cases where liver biopsy shows suggestive morphological changes [1]. *PAS stain* - **Periodic Acid-Schiff (PAS) stain** detects **carbohydrates** like glycogen and mucin, and can highlight alpha-1 antitrypsin globules in deficient patients. - While it can stain some viral inclusions, it is not specific for the **ground glass hepatocytes of HBV**. *Ziehl-Neelsen stain* - The **Ziehl-Neelsen stain** is an **acid-fast stain** primarily used to identify **acid-fast bacilli** such as *Mycobacterium tuberculosis*. - It is not used for the detection of **viral particles** or specific liver abnormalities. *Grocott's methenamine silver* - **Grocott's methenamine silver (GMS) stain** is primarily used to detect **fungal organisms** and *Pneumocystis jirovecii* in tissue samples. - It does not stain **viral components** or the characteristic features of **hepatitis B infection**. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 843-845.
Question 7: Mallory bodies are typically seen in all of the following conditions except:
- A. Primary biliary cirrhosis
- B. Hepatocellular carcinoma
- C. Neonatal hepatitis (Correct Answer)
- D. Alcoholic liver disease
Explanation: ***Neonatal hepatitis (does not present with Mallory bodies)*** - Mallory bodies are typically absent in neonatal hepatitis, which often presents with **hepatocellular necrosis** but not the characteristic cytoplasmic inclusions. - The condition predominantly affects newborns and is associated with **viral infections** rather than alcoholic injury leading to Mallory bodies. *Hepatocellular carcinoma* - Hepatocellular carcinoma may show **Mallory bodies**, particularly in cases that have underlying liver disease such as cirrhosis [2][3]. - They may also appear in the setting of **alcohol-related liver conditions** that can predate the carcinoma [1][4]. *Alcoholic liver disease* - Mallory bodies are a classic finding in alcoholic liver disease, forming due to **cytoskeletal damage** from alcohol metabolism [1][4][5]. - The presence of these bodies, along with **steatosis**, indicates severe liver injury related to alcohol consumption [1][4]. *Indian childhood cirrhosis* - This condition is associated with Mallory bodies and represents **cholestatic liver disease** linked to **nutritional deficiencies** and malabsorption in children. - Histologically, it shares features with alcoholic liver disease, including the presence of these abnormal inclusions [1][4]. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 389-390. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, p. 852. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 852-854. [4] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 388-389. [5] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 848-850.
Question 8: A liver biopsy shows 'nutmeg' pattern. Which additional finding would best support chronic passive congestion?
- A. Ground glass hepatocytes
- B. Bridging fibrosis
- C. Sinusoidal dilatation (Correct Answer)
- D. Mallory bodies
Explanation: ***Sinusoidal dilatation*** - Chronic passive congestion, often due to **right-sided heart failure**, leads to blood backing up in the liver, causing **distension of the sinusoids** [2], [3]. - This **dilatation** is most prominent around the central veins (zone 3), contributing to the characteristic **"nutmeg" appearance** as hepatocytes in this area become atrophic and necrotized due to hypoxia [1], [3]. *Ground glass hepatocytes* - These are hepatocytes with a pale, eosinophilic, and slightly granular cytoplasm, characteristic of **hepatitis B surface antigen (HBsAg)** accumulation. - They are not a direct feature of chronic passive congestion but rather indicate **viral hepatitis**. *Bridging fibrosis* - This refers to bands of **fibrous tissue** connecting portal tracts to central veins or linking adjacent portal tracts/central veins. - While it indicates significant liver damage and can be seen in chronic liver diseases, it is more characteristic of **chronic hepatitis** and progression towards cirrhosis [3], rather than acute or chronic passive congestion. *Mallory bodies* - Also known as **Mallory-Denk bodies**, these are **eosinophilic cytoplasmic inclusions** made of damaged intermediate filaments within hepatocytes. - They are most commonly associated with **alcoholic hepatitis**, but can also be seen in non-alcoholic steatohepatitis (NASH) and Wilson's disease, not passive congestion. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 401-402. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Hemodynamic Disorders, Thromboembolic Disease, and Shock, p. 126. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 870-872.
Question 9: A liver biopsy shows 'nutmeg' pattern. Which additional finding would best support chronic passive congestion?
- A. Bridging fibrosis
- B. Sinusoidal dilatation (Correct Answer)
- C. Mallory bodies
- D. Ground glass hepatocytes
Explanation: ***Sinusoidal dilatation*** - **Sinusoidal dilatation** is the **characteristic microscopic feature** of **chronic passive congestion** of the liver, directly responsible for the "nutmeg" appearance [1]. - This dilatation occurs due to increased venous pressure from right-sided heart failure, causing blood to back up into the **hepatic sinusoids**, particularly in **Zone 3 (centrilobular)** around the central veins [3]. - On gross examination, the alternating pattern of congested red-brown centrilobular areas and pale periportal areas creates the classic **nutmeg liver** appearance [1], [2]. *Bridging fibrosis* - **Bridging fibrosis** is a feature of **advanced/late-stage chronic passive congestion**, sometimes called **cardiac cirrhosis** or **cardiac sclerosis** [3]. - While long-standing congestion can eventually lead to centrilobular necrosis and fibrosis, **sinusoidal dilatation** is the **primary and early finding** that best supports the diagnosis. - Bridging fibrosis takes months to years to develop and represents chronic injury, not the acute/characteristic finding [3]. *Mallory bodies* - **Mallory bodies** (Mallory-Denk bodies) are diagnostic hallmarks of **alcoholic hepatitis** or **non-alcoholic steatohepatitis (NASH)**. - They represent aggregates of **intermediate filaments** (cytokeratin) within hepatocytes, unrelated to vascular congestion. *Ground glass hepatocytes* - **Ground-glass hepatocytes** are indicative of **chronic hepatitis B virus infection**, representing accumulated **hepatitis B surface antigen (HBsAg)** in the endoplasmic reticulum. - This finding is completely unrelated to **vascular congestion** or the nutmeg liver pattern. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Hemodynamic Disorders, Thromboembolic Disease, and Shock, p. 126. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 401-402. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 870-872.
Question 10: Which of the following liver tumors has a propensity to invade the portal or hepatic vein?
- A. Cavernous hemangioma
- B. Hepatocellular carcinoma (Correct Answer)
- C. Focal nodular hyperplasia
- D. Hepatic adenoma
Explanation: ***Hepatocellular carcinoma*** - **Hepatocellular carcinoma (HCC)** is known for its aggressive nature and a characteristic tendency to invade vascular structures, particularly the **portal vein** or hepatic veins [1]. - This **vascular invasion** contributes to its metastatic potential and is a critical factor in prognosis and treatment planning [1].*Cavernous hemangioma* - A **cavernous hemangioma** is a benign vascular tumor of the liver, typically recognized as an incidental finding. - While it is a vascular lesion, it does not invade the large hepatic or portal veins but rather consists of **dilated vascular spaces** within the liver parenchyma.*Focal nodular hyperplasia* - **Focal nodular hyperplasia (FNH)** is a **benign liver lesion** characterized by a central fibrous scar and radiating septa [2]. - It is typically well-circumscribed and does not exhibit aggressive features like **vascular invasion** [2].*Hepatic adenoma* - A **hepatic adenoma** is a benign tumor, often associated with oral contraceptive use, which can sometimes pose a risk of rupture or malignant transformation. - However, it does not typically show features of **vascular invasion** into the portal or hepatic veins [2]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 878-879. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 398-399.
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