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Difficulty: Very hardGastroenterology and Hepatology

Match each patient's clinical presentation and diagnostic findings with the most definitive histopathologic pattern expected on their liver biopsy.

  • An asymptomatic 45-year-old female evaluated for an alkaline phosphatase of 450 U/L. Serology reveals high titers of antibodies directed against the E2 subunit of the pyruvate dehydrogenase complex.Florid duct lesions characterized by noncaseating granulomatous destruction of medium-sized interlobular bile ducts
  • A 32-year-old male with chronic bloody diarrhea presents with jaundice. Cholangiography reveals alternating segments of stricturing and dilation in both the intrahepatic and extrahepatic biliary trees.Obliterative, concentric periductal fibrosis leading to replacement of bile ducts by solid fibrous cords
  • A 55-year-old female with a BMI of 35 kg/m² and hemoglobin A1c of 7.8% has mildly elevated transaminases. She consumes no alcohol, and viral serologies are negative.Macrovesicular steatosis accompanied by hepatocyte ballooning degeneration, Mallory-Denk bodies, and pericellular fibrosis
  • A 28-year-old female presents with amenorrhea and lethargy. Evaluation reveals AST 650 U/L, ALT 720 U/L, and elevated serum IgG. Immunofluorescence is positive for anti-smooth muscle antibodies.Prominent interface hepatitis with a dense portal inflammatory infiltrate predominantly composed of plasma cells
  • A 72-year-old male with severe secondary mitral regurgitation and right ventricular dilation presents with increasing abdominal girth and a pulsatile liver edge.Centrilobular sinusoidal dilation, severe congestion, and hemorrhagic necrosis with relative sparing of periportal regions

Answer

The presentations map to: 1) PBC to florid duct lesions, 2) PSC to obliterative concentric periductal fibrosis, 3) MASH to macrovesicular steatosis with ballooning degeneration, 4) Autoimmune Hepatitis to plasma cell-rich interface hepatitis, and 5) Congestive Hepatopathy to centrilobular congestion and necrosis.
Each clinical vignette uniquely identifies a specific hepatobiliary disease through pathognomonic serologic, imaging, or historical clues, which perfectly aligns with its classic histologic hallmark.

Step-by-Step Solution

1
Analyze Patient 1's serology
Identified as Primary Biliary Cholangitis (PBC)
Antibodies to the E2 subunit of the pyruvate dehydrogenase complex are the specific molecular target of Anti-Mitochondrial Antibodies (AMA). PBC specifically affects microscopic, interlobular bile ducts, forming granulomatous 'florid duct lesions'.
2
Analyze Patient 2's clinical history and imaging
Identified as Primary Sclerosing Cholangitis (PSC)
The history of chronic bloody diarrhea (Ulcerative Colitis) and alternating strictures/dilations on cholangiography are classic for PSC. This causes macroscopic and microscopic concentric periductal fibrosis ('onion-skinning').
3
Analyze Patient 3's metabolic risk factors
Identified as Metabolic dysfunction-associated steatohepatitis (MASH)
Obesity and type 2 diabetes in the absence of alcohol intake or viral hepatitis point to MASH. The hallmark is macrovesicular steatosis combined with hepatocyte ballooning and pericellular fibrosis.
4
Analyze Patient 4's immunology profile
Identified as Autoimmune Hepatitis (AIH)
Marked transaminitis, elevated IgG, and anti-smooth muscle antibodies (ASMA) diagnose Type 1 AIH. Biopsy reveals a plasma cell-predominant portal infiltrate causing interface hepatitis.
5
Analyze Patient 5's hemodynamic state
Identified as Congestive Hepatopathy
Severe right-sided heart failure transmits elevated venous pressures to the liver, causing a pulsatile liver edge. Backpressure predominantly affects the centrilobular regions (Zone 3) surrounding the central veins.

Key Concept

Correlation of distinct clinical hepatobiliary syndromes and serologic markers with their definitive histopathologic tissue patterns.
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Topics

Gastroenterology and Hepatology

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