Liver and Biliary Pathology — MCQs

Liver and Biliary Pathology Indian Medical PG Practice Questions and MCQs

Question 201: Absence of ultrahepatic bile ducts leads to which syndrome?

A. Von Meyenburg Complexes
B. Polycystic Liver Disease
C. Caroli Disease
D. Alagille Syndrome (Correct Answer)

Explanation: **Explanation:** **Alagille Syndrome (Correct Answer):** Alagille syndrome is an autosomal dominant disorder, most commonly caused by mutations in the **JAG1 gene** (Notch signaling pathway). The hallmark pathological feature is **ductopenia**, defined as a congenital scarcity or complete absence of intrahepatic bile ducts. This leads to chronic cholestasis. Clinically, it presents with a characteristic pentad: 1. Cholestasis (ductopenia) 2. Congenital heart defects (most commonly **peripheral pulmonary artery stenosis**) 3. Skeletal abnormalities (**butterfly vertebrae**) 4. Ocular findings (**posterior embryotoxon**) 5. Characteristic facial features (broad forehead, deep-set eyes, and pointed chin). **Incorrect Options:** * **Von Meyenburg Complexes:** These are small, benign **bile duct hamartomas**. They represent clusters of dilated intrahepatic bile ducts embedded in a fibrous stroma, rather than an absence of ducts [2]. * **Polycystic Liver Disease (PCLD):** Characterized by the presence of multiple epithelial-lined cysts. It is often associated with Autosomal Dominant Polycystic Kidney Disease (ADPKD) and results from ductal plate malformations, not ductopenia [1]. * **Caroli Disease:** This involves segmental **dilatation** of the larger intrahepatic bile ducts [2]. If associated with congenital hepatic fibrosis, it is termed Caroli Syndrome [2]. **NEET-PG High-Yield Pearls:** * **Definition of Ductopenia:** A ratio of bile ducts to portal tracts of **<0.5** (Normal is 0.9–1.8). * **JAG1 Mutation:** The most frequent genetic association (90% of cases). * **Butterfly Vertebrae:** A classic radiological sign frequently tested in integrated clinical questions. * **Posterior Embryotoxon:** An anteriorly displaced Schwalbe's line in the eye. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Kidney, pp. 952-953. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, p. 868.

Question 202: Which of the following antibodies are true for Autoimmune type II Liver disease?

A. LKM-1 antibody and LC-1, and LC-2 (Correct Answer)
B. Antinuclear antibody and DS DNA
C. LKM-1 antibody and Antismooth muscle antibody
D. DS DNA and LC-1, and LC-2

Explanation: ### Explanation Autoimmune Hepatitis (AIH) is a chronic inflammatory liver disease classified into two main types based on the specific circulating autoantibodies present. [1] **1. Why Option A is Correct:** **Type II AIH** typically affects children and adolescents and is characterized by the presence of: * **Anti-LKM-1 (Liver-Kidney Microsome type 1):** Directed against Cytochrome P450 2D6. [1] * **Anti-LC-1 (Liver Cytosol type 1):** Directed against formiminotransferase cyclodeaminase. [1] * **Anti-LC-2:** A less common but specific marker for Type II. This subtype is often more severe, progresses rapidly to cirrhosis, and is less responsive to standard therapy compared to Type I. [1] **2. Analysis of Incorrect Options:** * **Option B:** Antinuclear antibody (ANA) and Anti-dsDNA are characteristic of Systemic Lupus Erythematosus (SLE). While ANA is found in Type I AIH, dsDNA is not a primary marker for liver disease. [3] * **Option C:** This is a mix of types. **Anti-Smooth Muscle Antibody (ASMA)** and **ANA** are the hallmark markers for **Type I AIH** (the most common form worldwide). [1] * **Option D:** As mentioned, dsDNA is not a diagnostic marker for autoimmune hepatitis. **3. NEET-PG High-Yield Pearls:** * **Type I AIH:** Most common; associated with **ANA, ASMA (Anti-actin)**, and Anti-SLA/LP. It shows a bimodal age distribution. [1] * **Type II AIH:** Primarily pediatric; associated with **Anti-LKM-1 and Anti-LC-1**. [1] * **Histology:** Look for **"Interface Hepatitis"** (piecemeal necrosis) and a dense infiltrate of **Plasma Cells**. [2] * **HLA Associations:** Type I is linked to HLA-DR3/DR4; Type II is linked to HLA-DRB1/DQB1. * **Treatment:** Corticosteroids and Azathioprine are the mainstays of management. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 845-846. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, p. 846. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of the Immune System, pp. 226-227.

Question 203: Piece meal necrosis on liver biopsy is a feature of which of the following conditions?

A. Alcoholic hepatitis
B. Indian childhood cirrhosis
C. Chronic active hepatitis (Correct Answer)
D. Primary alcoholic cirrhosis

Explanation: **Explanation:** **Piecemeal necrosis** (also known as **Interface Hepatitis**) is the hallmark histological feature of **Chronic Active Hepatitis**. [1] 1. **Why the correct answer is right:** Piecemeal necrosis refers to the destruction of hepatocytes at the **limiting plate** (the boundary between the portal tract and the liver parenchyma). It is characterized by an inflammatory infiltrate (mainly lymphocytes and plasma cells) spilling out from the portal tract into the adjacent lobule, leading to the erosion of the limiting plate. [3] This process is a key indicator of disease activity and progression toward cirrhosis in chronic viral hepatitis (HBV, HCV) and autoimmune hepatitis. [2] 2. **Why the incorrect options are wrong:** * **Alcoholic hepatitis:** Characterized by **Mallory-Denk bodies**, hepatocyte swelling (ballooning degeneration), and neutrophilic infiltration, typically in a "chicken-wire" fibrosis pattern. [2] * **Indian childhood cirrhosis:** Distinctive for massive **Mallory body** formation and extensive pericellular fibrosis, but not primarily defined by interface hepatitis. * **Primary alcoholic cirrhosis:** Represents the end-stage of alcoholic liver disease with regenerative nodules and bridging fibrosis [1]; the acute inflammatory "piecemeal" activity is not its defining feature. **NEET-PG High-Yield Pearls:** * **Interface Hepatitis** is the modern term for Piecemeal Necrosis. [3] * **Ground glass hepatocytes** are seen in Chronic Hepatitis B (due to HBsAg accumulation). [1], [2] * **Councilman bodies** (acidophilic bodies) represent single-cell apoptosis, often seen in acute viral hepatitis and Yellow Fever. * **Bridging necrosis** (portal-to-portal or portal-to-central) indicates a more severe form of injury than piecemeal necrosis. [1] **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 843-844. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 388-389. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, p. 846.

Question 204: In Malaria, what histopathological changes would be observed in the liver?

A. Microabscess formation
B. Kupffer's cell hyperplasia with macrophage infiltration around the periportal area laden with pigments (Correct Answer)
C. Non-caseating granuloma
D. Non-specific finding of neutrophilic infiltration

Explanation: ### **Explanation** **Correct Answer: B. Kupffer's cell hyperplasia with macrophage infiltration around the periportal area laden with pigments** **Mechanism and Pathophysiology:** In Malaria (especially *P. falciparum*), the liver undergoes significant reactive changes due to the massive destruction of infected erythrocytes. The hallmark histopathological finding is the **hyperplasia of Kupffer cells** (resident liver macrophages) [2]. These cells become intensely phagocytic, engulfing parasitized red blood cells and **hemozoin pigment** (malarial pigment) [1]. Hemozoin is a dark-brown, granular, iron-containing pigment formed by the parasite from the breakdown of host hemoglobin [1]. These pigment-laden macrophages typically accumulate in the **periportal areas** and within the sinusoids, giving the liver a characteristic slate-gray or blackish discoloration macroscopically. **Analysis of Incorrect Options:** * **A. Microabscess formation:** This is characteristic of **pyogenic liver abscesses** (e.g., *E. coli*, *Klebsiella*) [1] or disseminated fungal infections (Candidiasis), not protozoal infections like malaria. * **C. Non-caseating granuloma:** This is the classic finding in **Sarcoidosis** [3], Berylliosis, or certain drug reactions. While some infections (like Leprosy or Brucellosis) cause granulomas, malaria does not. * **D. Non-specific neutrophilic infiltration:** Neutrophils are markers of acute bacterial inflammation or alcoholic hepatitis (Mallory-Denk bodies). In malaria, the cellular response is predominantly mononuclear (macrophages/Kupffer cells). **NEET-PG High-Yield Pearls:** * **Malarial Pigment (Hemozoin):** It is birefringent under polarized light and is also found in the spleen and bone marrow [1]. * **Durck’s Granulomas:** Small foci of microglial proliferation around necrotic cerebral vessels seen in **Cerebral Malaria**. * **Blackwater Fever:** Severe intravascular hemolysis leading to hemoglobinuria and acute renal failure, often associated with *P. falciparum*. * **Liver Function:** Despite these changes, clinical jaundice in malaria is usually pre-hepatic (hemolytic) rather than due to hepatocellular failure. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Diseases Of The Urinary And Male Genital Tracts, pp. 568-569. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 381-382. [3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 401-402.

Question 205: Centrilobular necrosis of the liver may be seen with which of the following exposures?

A. Phosphorus
B. Arsenic
C. Ethanol
D. Carbon tetrachloride (CCl4) (Correct Answer)

Explanation: **Explanation:** **Centrilobular necrosis (Zone 3 necrosis)** occurs primarily in the area surrounding the central vein. This zone is most susceptible to injury because it has the lowest oxygen tension and the highest concentration of **Cytochrome P450 enzymes**, which are responsible for the metabolic activation of many toxins [1]. **Why Carbon Tetrachloride (CCl4) is correct:** CCl4 is the classic example of a direct hepatotoxin that causes centrilobular necrosis. In the smooth endoplasmic reticulum of Zone 3 hepatocytes, CCl4 is converted by CYP450 (specifically CYP2E1) into the highly reactive **trichloromethyl radical (•CCl3)** [4]. This radical initiates **lipid peroxidation** of the intracellular membranes, leading to rapid cell swelling, fatty change, and subsequent centrilobular necrosis [4]. **Analysis of Incorrect Options:** * **Phosphorus:** Typically causes **Periportal necrosis (Zone 1)**. Zone 1 is the first to encounter blood-borne toxins absorbed from the gut. * **Arsenic:** Associated with **portal hypertension**, cirrhosis, and specifically **Angiosarcoma** of the liver, rather than acute centrilobular necrosis. * **Ethanol:** While chronic alcohol use affects Zone 3 (leading to steatosis and alcoholic hepatitis), acute "necrosis" as a classic toxicological hallmark is more specifically associated with CCl4 or Acetaminophen overdose in medical exams [2]. **High-Yield Facts for NEET-PG:** * **Zone 1 (Periportal):** Affected by Phosphorus, Eclampsia, and Ferrous sulfate toxicity. * **Zone 2 (Mid-zonal):** Affected by Yellow Fever. * **Zone 3 (Centrilobular):** Affected by CCl4, Acetaminophen (Paracetamol), Halothane, and Right-sided Heart Failure (Nutmeg liver) [1], [2]. * **Councilman Bodies:** Apoptotic hepatocytes seen in viral hepatitis and Yellow Fever [3]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 870-872. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, p. 832. [3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 386-387. [4] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Cellular Responses to Stress and Toxic Insults: Adaptation, Injury, and Death, pp. 62-63.

Question 206: What is the abnormality seen in Crigler-Najjar syndrome?

A. Uptake of bilirubin
B. Defect in hepatic conjugation (Correct Answer)
C. Canalicular release
D. Reduced bile excretion

Explanation: **Explanation:** **Crigler-Najjar Syndrome (CNS)** is a rare autosomal recessive disorder characterized by a genetic mutation in the **UGT1A1 gene**. This gene encodes the enzyme **Uridine diphosphate-glucuronosyltransferase (UGT)**, which is responsible for converting unconjugated bilirubin into water-soluble conjugated bilirubin [1]. 1. **Why Option B is Correct:** In CNS, there is either a total absence (Type I) or a severe deficiency (Type II) of the UGT enzyme [1]. This leads to a profound **defect in hepatic conjugation**, resulting in severe, persistent unconjugated hyperbilirubinemia. 2. **Why Other Options are Incorrect:** * **Option A (Uptake):** A defect in bilirubin uptake is characteristic of **Gilbert Syndrome** (though it also involves mild conjugation defects) [1]. * **Option C & D (Excretion/Release):** Defects in the excretion of conjugated bilirubin into the bile canaliculi are seen in **Dubin-Johnson Syndrome** (defect in MRP2 protein) and **Rotor Syndrome** [1]. These conditions present with conjugated hyperbilirubinemia. **High-Yield Clinical Pearls for NEET-PG:** * **Type I CNS:** Complete enzyme absence; serum bilirubin >20 mg/dL; does not respond to Phenobarbital; risk of **Kernicterus** is very high; treatment is usually a liver transplant [1]. * **Type II (Arias Syndrome):** Partial enzyme deficiency (<10%); serum bilirubin <20 mg/dL; **responds to Phenobarbital** (which induces the remaining enzyme activity) [1]. * **Histology:** Liver biopsy in CNS is typically **normal**, unlike Dubin-Johnson, which shows a characteristic "black liver" due to melanin-like pigment [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 858-860.

Question 207: Which of the following is NOT true regarding hepatic adenoma?

A. A benign lesion
B. Associated with oral contraceptive pill (OCP) use
C. More common in older females (Correct Answer)
D. Appears cold on isotope scan

Explanation: **Hepatic Adenoma: Explanation** **Why Option C is the correct answer (The False Statement):** Hepatic adenoma is most commonly seen in **young women of childbearing age** (typically 20–40 years), rather than older females. This demographic predilection is strongly linked to the hormonal influence of estrogen on the hepatocytes. **Analysis of Incorrect Options (True Statements):** * **A. A benign lesion:** Hepatic adenomas are benign epithelial tumors of the liver [1]. While they are non-cancerous, they are clinically significant due to the risk of rupture (causing intraperitoneal hemorrhage) or malignant transformation into hepatocellular carcinoma (especially the ̠-catenin mutated subtype) [2]. * **B. Associated with OCP use:** There is a well-established, dose-dependent relationship between the use of oral contraceptive pills and the development of these tumors [1]. Regression may occur upon discontinuation of the hormone [1]. * **C. Appears cold on isotope scan:** On a Technetium-99m sulfur colloid scan, hepatic adenomas typically appear as **"cold" spots**. This is because they lack normal bile ducts and have a deficiency or absence of Kupffer cells, which are required to take up the isotope. (In contrast, Focal Nodular Hyperplasia often appears "hot" or "isointense"). **High-Yield NEET-PG Pearls:** 1. **Risk Factors:** OCP use (most common), anabolic steroids, and Glycogen Storage Disease (Type I and III) [1]. 2. **Molecular Subtypes:** * *HNF1-̑ inactivated:* Low risk of malignancy; associated with fatty change [1]. * *̠-catenin activated:* **Highest risk** of malignant transformation [2]. * *Inflammatory:* Associated with obesity and CRP elevation. 3. **Clinical Presentation:** Often asymptomatic but can present with acute abdominal pain due to **spontaneous rupture**, especially during pregnancy. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, p. 874. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 874-875.

Question 208: What is the characteristic histological finding in Reye's syndrome?

A. Budding and branching of mitochondria
B. Swelling of the endoplasmic reticulum
C. Paranuclear microdense deposits
D. Glycogen depletion (Correct Answer)

Explanation: **Explanation:** Reye’s syndrome is an acute, life-threatening condition characterized by encephalopathy and fatty liver, typically following a viral illness (like Influenza or Varicella) in children treated with **aspirin**. **Why Glycogen Depletion is correct:** The hallmark of Reye’s syndrome is severe **mitochondrial dysfunction**. This leads to a failure of fatty acid oxidation and a subsequent metabolic crisis. To compensate for the lack of energy production, the body rapidly consumes all available glucose stores. Histologically, this manifests as a profound **depletion of glycogen** in hepatocytes, alongside the characteristic **microvesicular steatosis** (fine lipid droplets that do not displace the nucleus). **Analysis of Incorrect Options:** * **A & B (Mitochondrial and ER changes):** While mitochondrial damage is the primary trigger, the specific morphological changes seen under electron microscopy are **swelling and pleomorphism** of mitochondria (loss of cristae), not "budding and branching." Swelling of the ER is a non-specific sign of cell injury and not a diagnostic hallmark here. * **C (Paranuclear microdense deposits):** These are not associated with Reye’s syndrome. They are more characteristic of certain storage disorders or specific protein aggregation pathologies. **High-Yield Clinical Pearls for NEET-PG:** * **Aspirin Link:** Aspirin acts as a mitochondrial toxin in susceptible children by inhibiting beta-oxidation. * **Biochemical Markers:** Elevated serum ammonia, prolonged PT/INR, and elevated AST/ALT with **normal bilirubin** (a key distinguishing feature). * **Morphology:** Microvesicular steatosis is seen in Reye’s, Fatty Liver of Pregnancy, and Valproate toxicity. * **Brain Pathology:** Cerebral edema is the most common cause of death; however, there is typically **no inflammation** in the brain or liver.

Question 209: What type of obstruction characterizes Budd-Chiari syndrome?

A. Extrahepatic presinusoidal
B. Extrahepatic postsinusoidal (Correct Answer)
C. Sinusoidal
D. Intrahepatic postsinusoidal

Explanation: **Explanation:** **Budd-Chiari Syndrome (BCS)** is defined as the obstruction of hepatic venous outflow at any level from the small hepatic veins to the junction of the inferior vena cava (IVC) with the right atrium [1]. 1. **Why Option B is Correct:** The "sinusoid" is the functional unit of the liver. Obstruction occurring after the blood has passed through the sinusoids is termed **postsinusoidal**. Since the blockage in BCS occurs in the major hepatic veins or the IVC (outside the functional liver parenchyma), it is classified as **extrahepatic postsinusoidal** obstruction. This leads to increased sinusoidal pressure, centrilobular congestion, and necrosis [1]. 2. **Why Other Options are Incorrect:** * **Extrahepatic presinusoidal (A):** Refers to obstruction before blood reaches the liver, typically **Portal Vein Thrombosis**. * **Sinusoidal (C):** Refers to pathology within the sinusoids, such as **Cirrhosis** or Sickle Cell Disease. * **Intrahepatic postsinusoidal (D):** Refers to obstruction of the terminal hepatic venules (small venules) within the liver. The classic example is **Sinusoidal Obstruction Syndrome (Veno-occlusive disease)**, often seen after bone marrow transplantation or ingestion of pyrrolizidine alkaloids (Bush tea). **NEET-PG High-Yield Pearls:** * **Classic Triad:** Abdominal pain, hepatomegaly, and ascites. * **Morphology:** The liver shows a **"Nutmeg liver"** appearance (congestive hepatopathy) [1]. * **Microscopy:** Centrilobular (Zone 3) congestion and necrosis [1]. * **Imaging:** The **Caudate lobe** is often enlarged (hypertrophied) because it has independent venous drainage directly into the IVC, sparing it from the obstruction. * **Most common cause:** Polycythemia vera (and other hypercoagulable states) [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 869-870.

Question 210: Which of the following is a tumor marker for Hepatocellular carcinoma?

A. AFP (Correct Answer)
B. CEA
C. HCG
D. CA-125

Explanation: **Explanation:** **Hepatocellular Carcinoma (HCC)** is the most common primary malignancy of the liver, often arising in the setting of chronic hepatitis or cirrhosis [1]. **1. Why AFP is Correct:** **Alpha-Fetoprotein (AFP)** is a glycoprotein normally synthesized by the fetal liver and yolk sac. In adults, levels are typically negligible. However, in HCC, the malignant hepatocytes undergo "dedifferentiation" and resume production of this fetal protein. Raised serum alpha-fetoprotein is an established diagnostic marker, although it is not usually detectable in early or well-differentiated HCC [1]. * **Diagnostic Threshold:** While mild elevations occur in cirrhosis/hepatitis, levels **>400 ng/mL** in a high-risk patient are highly suggestive of HCC. * **Clinical Use:** It is used for screening high-risk patients (alongside ultrasound) and monitoring treatment response/recurrence [1]. **2. Why Other Options are Incorrect:** * **CEA (Carcinoembryonic Antigen):** Primarily used for **Colorectal Carcinoma**. It may also be elevated in pancreatic, gastric, and lung cancers, but is not specific to the liver. * **HCG (Human Chorionic Jogadotropin):** A marker for **Gestational Trophoblastic Disease** (Hydatidiform mole/Choriocarcinoma) and certain germ cell tumors (e.g., Seminoma). * **CA-125 (Cancer Antigen 125):** The primary marker for **Ovarian Cancer** (specifically epithelial types). **High-Yield Clinical Pearls for NEET-PG:** * **AFP-L3:** A specific isoform of AFP that is more specific for HCC than total AFP. * **DCP (Des-gamma-carboxy prothrombin):** Another highly specific marker for HCC, often used when AFP levels are low. * **Fibrolamellar Variant:** A subtype of HCC occurring in young adults without cirrhosis; notably, **AFP is usually normal** in these patients. * **Aetiology:** Globally, Hepatitis B is the most common cause; however, in the West, Hepatitis C and NAFLD are leading causes. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 399-400.

Practice by Chapter

Jaundice and Cholestasis

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Viral Hepatitis

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Alcoholic and Non-alcoholic Fatty Liver Disease

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Drug and Toxin Induced Liver Injury

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Cirrhosis and Its Complications

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Metabolic Liver Diseases

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Liver Tumors

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Gallbladder and Biliary Tract Diseases

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Congenital Liver Diseases

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Liver Transplantation Pathology

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