Liver Diseases in Children — MCQs
Hepatitis B infection spreads through all of the following routes except
A 2 month old baby presented with acute icteric viral hepatitis. The mother is a known hepatitis B carrier. Mother's hepatitis B virus serological profile is MOST likely to be:
Most common indication for liver transplant in children is?
Most common indication of liver transplantation in children is:
A patient presents to the emergency department with a history of ingestion of ten tablets of paracetamol. He has developed oliguria and liver function tests show deranged values. In the context of paracetamol overdose, which of the following can be used in the management of this condition?
A 13-year-old boy presents with jaundice, fatigue, muscle stiffness, tremors, and behavioral changes. Examination reveals an enlarged liver and spleen. A Kayser-Fleischer ring was noted. What is the definitive diagnostic test?
Which of the following statements about Wilson's disease is true?
Most common indication of liver transplantation in children:-
Most common indication for liver transplant in children-
A 5-year-old child is having acute liver failure. Which one of the following criteria is not included in the King's College criteria?
Liver Diseases in Children Indian Medical PG Practice Questions and MCQs
Question 1: Hepatitis B infection spreads through all of the following routes except
- A. Blood transfusion
- B. Sexual contact
- C. Perinatal transmission
- D. Fecal-oral route (Correct Answer)
Explanation: ***Fecal-oral route*** - **Hepatitis B** is primarily transmitted through contact with infected **blood** or **body fluids**, not via the fecal-oral route. - Diseases spread by the fecal-oral route are typically characterized by poor hygiene and contaminated food or water, which is not the case for Hepatitis B. *Blood transfusion* - Transmission through **blood transfusions** was a significant route before routine screening of blood products for **Hepatitis B surface antigen (HBsAg)** was implemented. - Although rare now in developed countries, it remains a possible route if unscreened blood is used. *Sexual contact* - **Hepatitis B virus (HBV)** is present in **semen** and **vaginal fluids**, making unprotected sexual intercourse a very common mode of transmission. - The risk of transmission increases with the number of partners and certain sexual practices. *Perinatal transmission* - **Perinatal transmission** from an infected mother to her newborn during **childbirth** is a major route of HBV spread, especially in endemic areas. - This can lead to chronic infection in infants if not prevented with immunoprophylaxis.
Question 2: A 2 month old baby presented with acute icteric viral hepatitis. The mother is a known hepatitis B carrier. Mother's hepatitis B virus serological profile is MOST likely to be:
- A. HBsAg and HBeAg positive (Correct Answer)
- B. HBsAg and HBe antibody positive
- C. HBsAg positive only
- D. HBV DNA positive
Explanation: ***HBsAg and HBeAg positive*** - A mother who is **HBsAg and HBeAg positive** has a high viral load and is highly infectious, making vertical transmission to her infant very likely, leading to acute icteric viral hepatitis in the newborn [1]. - **HBeAg positivity** indicates active viral replication, a key factor in efficient perinatal transmission of HBV [1]. *HBsAg and HBe antibody positive* - **HBe antibody positivity** indicates a lower viral load and less active viral replication, suggesting a lower risk of perinatal transmission than if HBeAg were positive [1]. - While the mother is a carrier (HBsAg positive), the presence of HBe antibody usually means the infection is in a less active, potentially chronic persistent phase, with reduced infectivity [1]. *HBsAg positive only* - A mother being **HBsAg positive only** (without HBeAg or antibody information) is insufficient to definitively determine the infectivity status or the likelihood of acute icteric hepatitis in the infant. - **HBsAg positivity** confirms carrier status but doesn't specify the level of viral replication or infectivity as precisely as HBeAg status [1]. *HBV DNA positive* - **HBV DNA positive** indicates the presence of viral genetic material, confirming active infection or replication, but it's a quantitative measure and doesn't replace the serological markers for assessing infectivity in the context of perinatal transmission [1]. - While strongly indicative of active infection, **HBV DNA positive** usually correlates with HBeAg positivity in highly infectious carriers, and HBeAg is the more specific serological marker for this high infectivity state [1].
Question 3: Most common indication for liver transplant in children is?
- A. Viral hepatitis with fulminant hepatic failure
- B. Biliary atresia (Correct Answer)
- C. Metabolic disease
- D. Hepatic tumor
Explanation: ***Biliary atresia*** - **Biliary atresia** is the leading cause of **cholestatic jaundice** in infants and the most common indication for **liver transplantation** in children. - It involves progressive **fibrosis and obliteration** of the intrahepatic or extrahepatic bile ducts, leading to **cirrhosis** and liver failure if untreated by hepatoportoenterostomy (Kasai procedure) or transplantation. *Viral hepatitis with fulminant hepatic failure* - While **viral hepatitis** (e.g., hepatitis A, B, or C) can cause **fulminant hepatic failure** in children, it represents a smaller proportion of overall pediatric liver transplant indications compared to biliary atresia. - Fulminant liver failure can arise from various etiologies, including viral, drug-induced, or metabolic causes, but biliary atresia specifically targets the bile ducts from birth. *Metabolic disease* - Various **metabolic diseases**, such as alpha-1 antitrypsin deficiency, tyrosinemia, or Wilson's disease, can necessitate liver transplantation in children. - These conditions often involve the accumulation of toxic substances in the liver, leading to **progressive liver damage**, but collectively they are less frequent indications than biliary atresia. *Hepatic tumor* - **Hepatic tumors**, such as **hepatoblastoma** or **hepatocellular carcinoma**, can require liver transplantation if resection is not possible or the tumor is multifocal. - While serious, these malignancies are less common indications for pediatric liver transplantation than biliary atresia, which affects a significant number of infants.
Question 4: Most common indication of liver transplantation in children is:
- A. Biliary atresia (Correct Answer)
- B. Wilson's disease
- C. Hemochromatosis
- D. Primary biliary cirrhosis
Explanation: ***Biliary atresia*** - **Biliary atresia** is the leading cause of chronic liver disease and liver transplant in children, accounting for approximately **50% of all pediatric liver transplants**. - It involves progressive **fibrosis and obliteration of the bile ducts**, leading to cholestasis, cirrhosis, and liver failure in infancy. *Wilson's disease* - While Wilson's disease can lead to liver failure requiring transplant, it is a **less common indication** than biliary atresia in children. - It is a genetic disorder of **copper metabolism**, leading to copper accumulation in various organs. *Hemochromatosis* - **Hemochromatosis** is a disorder of **iron overload** that can cause liver damage and cirrhosis. - However, it is a **rare indication for liver transplant in childhood** compared to biliary atresia. *Primary biliary cirrhosis* - **Primary biliary cirrhosis (PBC)** is an autoimmune disease primarily affecting **small bile ducts** in the liver. - PBC predominantly affects **adults, especially women**, and is a very rare cause of liver failure in children.
Question 5: A patient presents to the emergency department with a history of ingestion of ten tablets of paracetamol. He has developed oliguria and liver function tests show deranged values. In the context of paracetamol overdose, which of the following can be used in the management of this condition?
- A. N-acetylcysteine (Correct Answer)
- B. Dopamine
- C. Ursodeoxycholic acid
- D. Furosemide
Explanation: **Correct: N-acetylcysteine** - **N-acetylcysteine (NAC)** is the specific antidote for **paracetamol overdose**, working by replenishing **glutathione** stores in the liver. - Replenishing **glutathione** helps detoxify the toxic metabolite **N-acetyl-p-benzoquinone imine (NAPQI)**, preventing further **hepatic damage** and facilitating recovery in cases of **liver failure** and potential **renal damage** (oliguria). - Most effective when given within **8 hours** of ingestion, but remains beneficial even with **established hepatotoxicity** (as in this case with deranged LFTs). *Incorrect: Dopamine* - **Dopamine** is a **vasopressor** primarily used to increase **blood pressure** and **cardiac output** in conditions like **shock**. - While it might be used to support circulation in severe overdose complications, it does not directly treat the **paracetamol toxicity** itself. *Incorrect: Ursodeoxycholic acid* - **Ursodeoxycholic acid (UDCA)** is a **cholagogue** used in the management of **cholestatic liver diseases** (e.g., primary biliary cholangitis) by improving bile flow. - It has no role in the direct management of **acute liver failure** due to **paracetamol overdose**. *Incorrect: Furosemide* - **Furosemide** is a **loop diuretic** used to increase **urine output** in conditions like **fluid overload** or **heart failure**. - While **oliguria** is present, it is often a sign of **acute kidney injury** requiring supportive care, and furosemide would not address the underlying **toxic mechanism** of paracetamol.
Question 6: A 13-year-old boy presents with jaundice, fatigue, muscle stiffness, tremors, and behavioral changes. Examination reveals an enlarged liver and spleen. A Kayser-Fleischer ring was noted. What is the definitive diagnostic test?
- A. Urinary copper
- B. Serum ceruloplasmin
- C. Hepatic parenchymal copper concentration (Correct Answer)
- D. Slit lamp examination
- E. Genetic testing for ATP7B mutation
Explanation: ***Hepatic parenchymal copper concentration*** - This is considered the **gold standard** for diagnosing **Wilson's disease**, as it directly measures the accumulation of copper in the liver, which is the hallmark of the condition. - A concentration of **>250 mcg/g of dry liver weight** is diagnostic of Wilson's disease, irrespective of other laboratory findings. *Urinary copper* - While **elevated 24-hour urinary copper excretion** is a common finding in Wilson's disease, it can also be influenced by other conditions and may not always be definitively diagnostic on its own. - It is a **screening tool** and part of the diagnostic workup, but not the definitive diagnostic test as it's an indirect measure of copper overload. *Serum ceruloplasmin* - **Low serum ceruloplasmin levels** are characteristic of Wilson's disease because ceruloplasmin is the primary copper-carrying protein in the blood. - However, ceruloplasmin levels can be **normal in some Wilson's patients**, especially those presenting with hepatic manifestations, and can be low in other conditions like severe liver failure or malabsorption. *Slit lamp examination* - A **slit lamp examination** is used to identify **Kayser-Fleischer rings**, which are corneal copper deposits. - While their presence is highly suggestive of Wilson's disease, especially with neurological symptoms, they **may be absent in up to 30-50% of patients** with hepatic-only presentations, and their absence does not rule out the disease. *Genetic testing for ATP7B mutation* - **Molecular genetic testing** can identify mutations in the ATP7B gene, which encodes the copper-transporting ATPase. - While highly specific for confirming Wilson's disease and useful for family screening, it is a **confirmatory test** rather than the definitive diagnostic test, as over 500 different mutations exist and not all are identified in routine testing. - Hepatic copper measurement remains the diagnostic standard as it directly demonstrates the pathophysiologic defect.
Question 7: Which of the following statements about Wilson's disease is true?
- A. Low serum ceruloplasmin and low urinary copper
- B. Low serum ceruloplasmin and high urinary copper (Correct Answer)
- C. High serum ceruloplasmin and low urinary copper
- D. High serum ceruloplasmin and high urinary copper
Explanation: ***Low serum ceruloplasmin and high urinary copper*** - In **Wilson's disease**, there is a defect in **copper transport**, leading to impaired incorporation of copper into ceruloplasmin and reduced biliary excretion. - This results in **low serum ceruloplasmin** levels (since ceruloplasmin is the main copper-carrying protein in the blood) and **increased urinary copper excretion** as the body attempts to eliminate excess free copper. *Low serum ceruloplasmin and low urinary copper* - While **low serum ceruloplasmin** is characteristic, **low urinary copper** would indicate adequate copper elimination or a different condition, which is not the case for Wilson's disease. - Patients with Wilson's disease have **excess copper accumulation**, and increased urinary excretion is a compensatory mechanism [1]. *High serum ceruloplasmin and low urinary copper* - **High serum ceruloplasmin** is inconsistent with Wilson's disease, as ceruloplasmin levels are typically low due to the impaired copper binding. - **Low urinary copper** excretion would indicate normal or low total body copper, which contradicts the copper overload seen in Wilson's disease. *High serum ceruloplasmin and high urinary copper* - **High serum ceruloplasmin** would suggest normal or increased ceruloplasmin synthesis or release, which is contrary to the pathophysiology of Wilson's disease. - Although **high urinary copper** is a feature, it isn't accompanied by high ceruloplasmin in this condition, as ceruloplasmin is primarily involved in carrying copper in the blood rather than excreting excess copper [1].
Question 8: Most common indication of liver transplantation in children:-
- A. Primary biliary cirrhosis
- B. Biliary atresia (Correct Answer)
- C. Hemochromatosis
- D. Wilson's disease
Explanation: ***Biliary atresia*** - **Biliary atresia** is a progressive inflammatory destruction of the **extrahepatic biliary tree** in infants, leading to **cholestasis**, cirrhosis, and liver failure, necessitating a liver transplant. - It is the most common cause of **cholestatic jaundice** in infancy and the leading indication for **liver transplantation in pediatric patients**. *Primary biliary cirrhosis* - **Primary biliary cirrhosis (PBC)** is an **autoimmune disease** predominantly affecting **middle-aged women**, causing progressive destruction of small bile ducts. - It is rarely seen in children and would not be the most common indication for pediatric liver transplantation. *Hemochromatosis* - **Hemochromatosis** is a genetic disorder causing excessive **iron absorption and deposition** in various organs, including the liver, leading to damage. - While it can necessitate liver transplantation in severe cases, it is much less common than biliary atresia as an indication in children. *Wilson's disease* - **Wilson's disease** is a rare genetic disorder characterized by impaired copper metabolism, leading to copper accumulation in the liver, brain, and other organs. - Though it can cause liver failure and require transplantation, it is not as common as biliary atresia in the pediatric population.
Question 9: Most common indication for liver transplant in children-
- A. Biliary atresia (Correct Answer)
- B. Cirrhosis
- C. Hepatitis
- D. Drug reactions
Explanation: ***Biliary atresia*** - **Biliary atresia** is the leading cause of chronic cholestasis and end-stage liver disease in infants, making it the most common indication for **liver transplantation** in children. - Due to progressive scarring and obstruction of the bile ducts, it leads to early onset **cirrhosis** and liver failure if not surgically corrected or transplanted. *Cirrhosis* - While **cirrhosis** is an indication for liver transplant, it is a *consequence* of various liver diseases, and not a primary diagnosis itself. - In children, **biliary atresia** is often the underlying cause of cirrhosis that necessitates transplantation. *Hepatitis* - **Hepatitis**, particularly viral hepatitis, can lead to liver failure, but it is less common as a primary indication for transplant in children compared to **biliary atresia**. - Many forms of hepatitis in children may resolve or be managed without the need for transplantation. *Drug reactions* - Severe **drug-induced liver injury** (DILI) requiring transplantation is rare in children. - It accounts for a very small percentage of pediatric liver transplant indications compared to congenital conditions like **biliary atresia**.
Question 10: A 5-year-old child is having acute liver failure. Which one of the following criteria is not included in the King's College criteria?
- A. Age < 11 years (Correct Answer)
- B. INR > 6.5
- C. Jaundice < 7 days before development of encephalopathy
- D. Bilirubin > 300 mmol/L
Explanation: ***Age < 11 years*** - Age is **NOT included** in the original King's College criteria for acute liver failure - King's College criteria are based on **biochemical parameters** (INR, bilirubin, pH, creatinine) and **clinical factors** (encephalopathy grade, jaundice-to-encephalopathy interval), not patient age - While **younger age may be a prognostic factor** in pediatric liver failure, it is not part of the formal King's College criteria used to predict poor prognosis or need for transplantation *INR > 6.5* - An **elevated INR > 6.5** (or PT > 100 seconds) is a **key criterion** in King's College criteria for non-paracetamol acute liver failure - Indicates severe **coagulopathy** and hepatic synthetic dysfunction - One of the most important predictors of poor outcome *Jaundice < 7 days before development of encephalopathy* - The **interval from jaundice to encephalopathy** is explicitly included in King's College criteria for non-paracetamol ALF - Jaundice to encephalopathy < 7 days = hyperacute (relatively better prognosis) - Jaundice to encephalopathy > 7 days = subacute (worse prognosis, indicates need for transplant) - This temporal relationship is a **critical prognostic indicator** *Bilirubin > 300 mmol/L* - **Serum bilirubin > 300 μmol/L** (17.5 mg/dL) is explicitly included in King's College criteria for non-paracetamol ALF - Indicates severe **cholestasis** and hepatocellular dysfunction - Part of the multi-parameter assessment for transplant listing
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