Liver and Biliary Pathology — MCQs

Liver and Biliary Pathology Indian Medical PG Practice Questions and MCQs

Question 1: Overgrowth of the bile duct in a localized region is termed as:

A. Hamartoma (Correct Answer)
B. Choristoma
C. Polyp
D. Malignant tumor

Explanation: ### Explanation **Correct Answer: A. Hamartoma** A **Hamartoma** is defined as a benign, focal overgrowth of cells and tissues native to the anatomical site where it is found. In the liver, a localized overgrowth of bile ducts (often associated with fibrous stroma) is known as a **Biliary Hamartoma** (also called a Von Meyenburg Complex) [1]. These are typically small, multiple, and represent a failure of embryonic involution of the ductal plate. **Why other options are incorrect:** * **B. Choristoma:** This refers to a mass of histologically normal tissue in an **abnormal** anatomical location (e.g., pancreatic tissue found in the stomach wall). Since bile ducts are native to the liver, their overgrowth cannot be a choristoma. * **C. Polyp:** A polyp is a macroscopic projection above a mucosal surface. While some polyps can be hamartomatous, the term "polyp" describes a physical shape rather than the specific pathological process of localized tissue overgrowth. * **D. Malignant tumor:** Malignancy involves uncontrolled, autonomous growth with the potential for metastasis and invasion [2]. A localized overgrowth of mature, native tissue is a benign developmental anomaly, not a malignancy. **High-Yield NEET-PG Pearls:** * **Von Meyenburg Complexes (Biliary Hamartomas):** Often discovered incidentally on imaging or autopsy. On MRI, they appear as multiple small, "starry sky" cystic lesions [1]. * **Ductal Plate Malformations:** Biliary hamartomas belong to this group of diseases, which also includes Polycystic Liver Disease and Caroli Disease. * **Key Distinction:** Remember the "H" in **H**amartoma for **H**ere (native site) and the "C" in **C**horistoma for **C**hanged location (ectopic). **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 400-401. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, p. 276.

Question 2: Ground glass hepatocytes are seen in which of the viral hepatitis?

A. Hepatitis A Virus (HAV)
B. Hepatitis B Virus (HBV) (Correct Answer)
C. Hepatitis C Virus (HCV)
D. Hepatitis D Virus (HDV)

Explanation: **Explanation:** **Ground glass hepatocytes** are a classic histopathological hallmark of **Chronic Hepatitis B Virus (HBV) infection** [1]. This appearance is caused by the massive accumulation of **Hepatitis B surface Antigen (HBsAg)** within the smooth endoplasmic reticulum (SER) of the hepatocytes [1]. On H&E staining, the cytoplasm appears granular, eosinophilic, and has a "foggy" or "frosted glass" translucency, often pushing the nucleus to the periphery [1]. **Why the other options are incorrect:** * **Hepatitis A (HAV):** Typically causes acute hepatitis characterized by ballooning degeneration and acidophilic (Councilman) bodies, but it does not produce ground glass changes as it does not lead to chronic HBsAg accumulation [2]. * **Hepatitis C (HCV):** The characteristic histological features of HCV include **lymphoid aggregates** or follicles in the portal tracts and **macrovesicular steatosis** (fatty changes) [1]. * **Hepatitis D (HDV):** While HDV requires HBV for replication, it is not independently associated with ground glass cells. In some cases of HDV co-infection, a "sanded nuclei" appearance (due to HBcAg) may be noted, but ground glass cytoplasm specifically refers to HBsAg. **High-Yield Clinical Pearls for NEET-PG:** * **Special Stains:** Ground glass hepatocytes can be highlighted using **Orcein stain**, **Victoria blue**, or **Aldehyde fuchsin** (appearing dark brown/purple). * **Differential Diagnosis:** Ground glass appearance can also be seen in patients taking certain drugs (e.g., Cytochrome P450 inducers like Phenobarbital) due to SER hypertrophy, and in **Type IV Glycogen Storage Disease** (Lafora body disease). * **Councilman Bodies:** These are apoptotic, shrunken, intensely eosinophilic hepatocytes seen in many viral hepatitides (especially Yellow Fever and HAV), not to be confused with ground glass cells. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 843-845. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, p. 842.

Question 3: Extrahepatic cholestasis is associated with which of the following findings?

A. Total bilirubin in urine (Correct Answer)
B. Total urobilinogen in urine
C. Total bilirubin and total urobilinogen in serum
D. Total bilirubin in serum

Explanation: **Explanation:** Extrahepatic cholestasis (obstructive jaundice) occurs when there is a physical blockage in the biliary tree (e.g., gallstones, carcinoma of the pancreas head) [1]. This prevents conjugated bilirubin from entering the intestine. **1. Why Option A is correct:** In cholestasis, the liver continues to conjugate bilirubin, but it cannot be excreted into the bile. Consequently, **conjugated bilirubin** regurgitates into the bloodstream. Unlike unconjugated bilirubin, conjugated bilirubin is **water-soluble** and can be filtered by the renal glomeruli [2]. Its presence in the urine (bilirubinuria) is a hallmark of obstructive jaundice and gives the urine a characteristic "dark tea" color [1]. **2. Why the other options are incorrect:** * **Option B:** Since bile cannot reach the intestine, gut bacteria cannot convert bilirubin into **urobilinogen**. Therefore, urobilinogen will be **absent** (or significantly decreased) in the urine in complete extrahepatic cholestasis [2]. * **Option C & D:** While serum bilirubin levels do rise in cholestasis, these options are less specific. "Total bilirubin in serum" is elevated in all types of jaundice (pre-hepatic, hepatic, and post-hepatic). The question asks for a finding *associated* with the condition; the presence of bilirubin in the urine is the most definitive clinical finding distinguishing obstructive/hepatocellular jaundice from hemolytic jaundice. **High-Yield NEET-PG Pearls:** * **Van den Bergh Reaction:** Obstructive jaundice gives a **Direct Positive** reaction (due to conjugated bilirubin). * **Stool Findings:** Due to the lack of stercobilin, patients present with **clay-colored (acholic) stools** [1]. * **Enzymes:** Characterized by a disproportionate rise in **Alkaline Phosphatase (ALP)** and **GGT** compared to ALT/AST. * **Pruritus:** Often present due to the systemic accumulation of bile salts. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 380-381. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 384-385.

Question 4: Which of the following is NOT a characteristic of hepatic adenoma?

A. Normal liver architecture (Correct Answer)
B. Increased fat
C. Increased glycogen
D. Cells arranged in cords

Explanation: **Explanation:** Hepatic Adenoma is a benign liver tumor primarily seen in young women associated with oral contraceptive use [1]. The hallmark of any true neoplasm (even benign) is the **loss of normal architecture** [2]. **1. Why "Normal liver architecture" is the correct answer:** In hepatic adenoma, the normal lobular architecture is **absent**. Specifically, there is a complete lack of **portal tracts** (no bile ducts) [1]. The presence of normal architecture, including portal triads and central veins, is characteristic of Focal Nodular Hyperplasia (FNH) or normal liver tissue, not an adenoma. **2. Analysis of incorrect options:** * **Increased fat & Glycogen:** Adenoma cells are often "clearer" than normal hepatocytes because they frequently accumulate high amounts of glycogen and lipid (steatosis) [1]. This is a common histological finding. * **Cells arranged in cords:** The tumor is composed of sheets or cords of hepatocytes that closely resemble normal cells but are separated by prominent orphan arteries (unpaired arteries) rather than normal portal structures [1]. **High-Yield Clinical Pearls for NEET-PG:** * **Risk Factors:** Oral contraceptive pills (OCPs), anabolic steroids, and Glycogen Storage Disease Type I (von Gierke) [1]. * **Complications:** High risk of **spontaneous rupture and intraperitoneal hemorrhage**, especially during pregnancy. * **Molecular Subtypes:** * *HNF1-α inactivated:* Lowest risk of malignancy, often fatty [1]. * *β-catenin activated:* **Highest risk** of malignant transformation to Hepatocellular Carcinoma (HCC) [1]. * *Inflammatory:* Associated with obesity and elevated CRP. * **Radiology:** Often shows "cold" spots on sulfur colloid scans (unlike FNH). **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 874-875. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, pp. 276-278.

Question 5: Which substance is/are not deposited in a hepatocyte?

A. Lipofuscin
B. Melanin-like pigment
C. Bile pigment (Correct Answer)
D. Melanin

Explanation: ### Explanation The correct answer is **C. Bile pigment**. In pathology, it is crucial to distinguish between substances that are **produced** by a cell and those that are **deposited** within it. 1. **Why Bile Pigment is the correct answer:** Bile is a physiological product synthesized and secreted by hepatocytes [1], [3]. In conditions of cholestasis, bile may accumulate within the hepatocyte cytoplasm (appearing as yellow-green plugs). However, according to standard pathology nomenclature (Robbins), bile is considered a **secretory product** rather than an exogenous or endogenous "deposit" or "pigment of wear and tear." 2. **Analysis of Incorrect Options:** * **Lipofuscin (A):** Known as the "wear and tear" pigment, it is an endogenous deposit representing lipid peroxidation of subcellular membranes. It is commonly seen in the hepatocytes of aging individuals or those with atrophy (Brown atrophy). * **Melanin-like pigment (B):** This is a classic feature of **Dubin-Johnson Syndrome** [2]. The liver appears black grossly due to the accumulation of a coarsely granular, melanin-like pigment (metabolites of epinephrine) within the lysosomes of hepatocytes [2]. * **Melanin (D):** While primary melanin is produced by melanocytes, it is generally not found in hepatocytes. However, in the context of this specific question (often a repeat from older medical exams), the distinction rests on the "secretory" nature of bile versus the "storage/deposition" nature of the others. ### High-Yield NEET-PG Pearls: * **Dubin-Johnson Syndrome:** Characterized by a defect in the **MRP2** transporter, leading to "Black Liver" due to melanin-like pigment [2]. * **Rotor Syndrome:** Similar to Dubin-Johnson but **lacks** the liver pigmentation [2]. * **Iron Deposition:** Stains with **Prussian Blue** (Perl’s stain). In Hemochromatosis, iron deposits first in the periportal hepatocytes. * **Mallory-Denk Bodies:** These are inclusions of pre-keratin intermediate filaments (cytokeratin 8 and 18) commonly seen in alcoholic liver disease. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 384-385. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, p. 860. [3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 381-382.

Question 6: Which of the following statements is NOT true about hepatoblastoma?

A. It is most common in children.
B. Mature hepatocytes are present. (Correct Answer)
C. It is not associated with cirrhosis.
D. It is fatal if untreated.

Explanation: **Hepatoblastoma** is the most common primary liver tumor in children, typically occurring before the age of 3 [1], [2]. ### **Explanation of the Correct Answer** **Option B is NOT true** because hepatoblastoma is composed of **primitive, immature cells**, not mature hepatocytes. Histologically, it is divided into two main types [1]: 1. **Epithelial type:** Consists of small, polygonal **fetal cells** (forming cords) or even smaller, primitive **embryonal cells** (forming sheets/rosettes) [1]. 2. **Mixed epithelial-mesenchymal type:** Contains the epithelial components plus primitive mesenchyme (fibrous tissue, osteoid, or cartilage) [1]. The presence of mature hepatocytes would be more characteristic of a regenerative nodule or a well-differentiated hepatocellular carcinoma, not this embryonal tumor [1]. ### **Analysis of Other Options** * **Option A:** True. It is the most common pediatric liver malignancy, with the majority of cases diagnosed before age 2 [1]. * **Option C:** True. Unlike Hepatocellular Carcinoma (HCC) in adults, hepatoblastoma typically arises in a **non-cirrhotic liver**. * **Option D:** True. If left untreated, the tumor is aggressive and fatal due to local invasion and distant metastasis (most commonly to the lungs). ### **NEET-PG High-Yield Pearls** * **Tumor Marker:** Serum **Alpha-fetoprotein (AFP)** is significantly elevated in 90% of cases and is used for diagnosis and monitoring recurrence. * **Genetic Association:** Strongly associated with **Familial Adenomatous Polyposis (FAP)** and **Beckwith-Wiedemann Syndrome**. * **Molecular Pathogenesis:** Mutations in the **Wnt/β-catenin signaling pathway** (CTNNB1 gene) are found in nearly all cases [1]. * **Morphology Hint:** Look for "osteoid" or "squamous islands" in the mixed type; these are classic pathological descriptors [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 875-876. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. (Basic Pathology) introduces the student to key general principles of pathology, both as a medical science and as a clinical activity with a vital role in patient care. Part 2 (Disease Mechanisms) provides fundamental knowledge about the cellular and molecular processes involved in diseases, providing the rationale for their treatment. Part 3 (Systematic Pathology) deals in detail with specific diseases, with emphasis on the clinically important aspects., pp. 211-212.

Question 7: All are potential carcinogens for hepatic angiosarcoma except?

A. Thorotrast
B. Arsenic
C. Polyvinyl chloride
D. Naphthylamine (Correct Answer)

Explanation: **Explanation:** **Hepatic Angiosarcoma** is a rare, highly aggressive mesenchymal tumor of the liver. It is unique in pathology because it has a strong association with specific environmental and occupational chemical exposures. **1. Why Naphthylamine is the correct answer:** **Naphthylamine** (specifically 2-Naphthylamine) is a classic carcinogen associated with **Transitional Cell Carcinoma (TCC) of the Urinary Bladder**, not the liver [1]. It is an aromatic amine used in the dye and rubber industries. It undergoes metabolism in the liver but is activated in the bladder, leading to urothelial malignancy. **2. Analysis of Incorrect Options (Known Carcinogens for Angiosarcoma):** * **Thorotrast (Option A):** A radioactive contrast medium (Thorium dioxide) used historically in radiology [1]. It emits alpha particles and has a long half-life, depositing in the Liver (Kupffer cells), Spleen, and Bone marrow. It is the most potent risk factor for hepatic angiosarcoma [1]. * **Arsenic (Option B):** Chronic exposure to arsenic (via contaminated well water or medicinal Fowler’s solution) is a well-documented cause of both skin cancer and hepatic angiosarcoma. * **Polyvinyl Chloride (Option C):** Workers in the plastics industry exposed to **Vinyl Chloride Monomer (VCM)** gas are at a significantly increased risk [1]. This is a classic "occupational" association frequently tested in exams. **3. High-Yield Clinical Pearls for NEET-PG:** * **Tumor Marker:** Angiosarcomas are of endothelial origin; hence, they express **CD31** (most specific), **CD34**, and **von Willebrand factor**. * **Latency:** The period between exposure (e.g., Thorotrast) and tumor development is often very long (20–30 years). * **Aflatoxin B1:** Remember, this is associated with **Hepatocellular Carcinoma (HCC)**, not angiosarcoma [2]. * **Oral Contraceptive Pills (OCPs):** Associated with **Hepatic Adenoma**, not angiosarcoma. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. (Basic Pathology) introduces the student to key general principles of pathology, both as a medical science and as a clinical activity with a vital role in patient care. Part 2 (Disease Mechanisms) provides fundamental knowledge about the cellular and molecular processes involved in diseases, providing the rationale for their treatment. Part 3 (Systematic Pathology) deals in detail with specific diseases, with emphasis on the clinically important aspects., pp. 216-218. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. (Basic Pathology) introduces the student to key general principles of pathology, both as a medical science and as a clinical activity with a vital role in patient care. Part 2 (Disease Mechanisms) provides fundamental knowledge about the cellular and molecular processes involved in diseases, providing the rationale for their treatment. Part 3 (Systematic Pathology) deals in detail with specific diseases, with emphasis on the clinically important aspects., pp. 215-216.

Question 8: What is the primary cause of bleeding disorder in liver damage?

A. Decreased level of prothrombin (Correct Answer)
B. Lack of vitamin K
C. Platelet deficiency
D. Lack of vitamin B

Explanation: **Explanation:** The liver is the central hub for the synthesis of almost all coagulation factors [1]. In chronic or acute liver damage, the synthetic function of hepatocytes is compromised, leading to a significant reduction in the production of clotting factors. **Why Option A is Correct:** Prothrombin (Factor II) is a key vitamin K-dependent glycoprotein synthesized by the liver [1]. It is the precursor to thrombin, which converts fibrinogen into fibrin. In liver disease, the **decreased synthesis of prothrombin** (along with Factors VII, IX, and X) is the primary and most direct cause of a bleeding diathesis [1]. This is why the Prothrombin Time (PT) is the most sensitive laboratory marker for assessing the liver's synthetic function. **Why Other Options are Incorrect:** * **B. Lack of Vitamin K:** While vitamin K is necessary for the carboxylation of certain factors, the primary issue in liver *damage* is the inability of the hepatocytes to utilize the vitamin or synthesize the protein backbone itself, rather than a simple dietary lack of the vitamin. * **C. Platelet Deficiency:** Thrombocytopenia does occur in liver disease (often due to hypersplenism from portal hypertension or decreased thrombopoietin), but it is considered a secondary or contributory factor rather than the "primary" biochemical cause of the coagulation defect. * **D. Lack of Vitamin B:** Vitamin B (like B12 or Folate) deficiency can cause macrocytic anemia but does not directly cause the primary bleeding disorder associated with hepatic failure. **High-Yield Clinical Pearls for NEET-PG:** * **Factor VII** has the shortest half-life (approx. 6 hours), making PT the earliest indicator of liver dysfunction. * **Factor VIII** is the only clotting factor **not** exclusively synthesized by hepatocytes (it is produced by sinusoidal endothelial cells); thus, its levels may remain normal or even be elevated in liver failure. * **Vitamin K Challenge (Koller Test):** Used to differentiate obstructive jaundice from parenchymal liver disease. If PT improves after Vit K injection, the cause is likely obstructive (malabsorption). **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Blood And Bone Marrow Disease, pp. 582-583, 624-625.

Question 9: Ductopenic cholestasis is seen in all EXCEPT:

A. Carbamazepine
B. Chlorpromazine
C. Tricyclic antidepressant agents
D. Methyldopa (Correct Answer)

Explanation: **Explanation:** **Ductopenic cholestasis**, also known as **Vanishing Bile Duct Syndrome (VBDS)**, is characterized by the progressive destruction and loss of intrahepatic bile ducts (specifically the interlobular ducts) [1]. **Why Methyldopa is the correct answer:** Methyldopa typically causes an **acute hepatitis-like picture** or a chronic hepatitis pattern [2]. Its mechanism of injury is usually related to the production of toxic metabolites or an autoimmune-mediated reaction rather than the destruction of bile ducts [3]. It is not associated with the "vanishing bile duct" phenomenon. **Analysis of Incorrect Options (Causes of Ductopenia):** * **Chlorpromazine:** This is the classic prototype for drug-induced cholestasis. While it usually causes reversible cholestasis, chronic use can lead to a "primary biliary cholangitis-like" syndrome with actual duct loss. * **Carbamazepine:** This anticonvulsant is a well-documented cause of idiosyncratic liver injury that can manifest as severe ductopenia [3]. * **Tricyclic Antidepressants (TCAs):** Agents like amitriptyline are known to cause cholestatic liver injury which, in rare cases, progresses to permanent bile duct loss. **High-Yield Clinical Pearls for NEET-PG:** * **Definition of Ductopenia:** Defined histologically as the absence of bile ducts in more than 50% of the portal tracts (minimum 10 portal tracts should be evaluated). * **Other Causes of VBDS:** * **Genetic:** Alagille Syndrome (most common inherited cause). * **Autoimmune:** Primary Biliary Cholangitis (PBC), Primary Sclerosing Cholangitis (PSC) [1]. * **Infectious:** CMV, Congenital Syphilis. * **Others:** Graft-versus-host disease (GVHD), Chronic Rejection of liver transplant. * **Drug Mnemonic:** Remember **"C-C-A"** for drug-induced VBDS: **C**hlorpromazine, **C**arbamazepine, **A**ugmentin (Amoxicillin-Clavulanate). **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 864-865. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 846-847. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 847-848.

Question 10: Which of the following statements about focal nodular hyperplasia is NOT true?

A. Multiple nodules may be present.
B. It is more common in males. (Correct Answer)
C. It may be associated with oral contraceptive pill use.
D. It is hypovascular on the arterial phase and hypervascular on the delayed phase of CT images.

Explanation: ### Explanation **Focal Nodular Hyperplasia (FNH)** is the second most common benign liver tumor after hemangioma [1]. It is not a true neoplasm but a hyperplastic response to a pre-existing vascular malformation. **1. Why Option B is the Correct Answer (The False Statement):** FNH is significantly **more common in females** (female-to-male ratio of approximately 8:1 to 9:1), typically occurring in the 3rd to 5th decades of life. The statement that it is more common in males is incorrect. **2. Analysis of Other Options:** * **Option A:** While FNH is usually solitary (80%), **multiple nodules** can occur in about 20% of cases. * **Option C:** Although FNH is not caused by **Oral Contraceptive Pills (OCPs)** (unlike hepatic adenoma), OCPs may stimulate the growth of a pre-existing FNH due to estrogen sensitivity. * **Option D:** This statement is **incorrect regarding typical radiology**, but in the context of NEET-PG "Except" questions, Option B is the "most" false. *Note: Classically, FNH is hypervascular (bright) in the arterial phase and becomes isodense in the delayed phase.* However, in many exam patterns, the gender predilection is the primary high-yield discriminator. --- ### High-Yield Clinical Pearls for NEET-PG: * **Gross Morphology:** Characterized by a pathognomonic **Central Stellate Scar** (fibrous) containing a large anomalous artery. * **Microscopy:** Shows nodules of normal hepatocytes separated by fibrous septa containing bile duct proliferation (ductular reaction) but **no normal portal triads**. * **Radiology:** "Spoke-wheel" appearance on angiography due to the central artery. * **Management:** Usually asymptomatic and carries **no risk of malignant transformation** or spontaneous rupture (unlike hepatic adenoma), thus often managed conservatively. * **Key Association:** May be associated with other vascular anomalies like hemangiomas or hereditary hemorrhagic telangiectasia (HHT). **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 398-399.

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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