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Difficulty: MediumGastroenterology and Hepatology

A gastroenterology team is evaluating several adult patients presenting with elevated liver function tests and suspected chronic liver disease. Match each clinical diagnosis with its most specific characteristic serologic marker or initial diagnostic laboratory finding.

  • Primary biliary cholangitisElevated titers of anti-mitochondrial antibodies (AMA)
  • Primary sclerosing cholangitisPositive perinuclear anti-neutrophil cytoplasmic antibodies (p-ANCA) and typical MRCP findings
  • Autoimmune hepatitis (Type 1)Elevated titers of anti-smooth muscle antibodies (ASMA) and hypergammaglobulinemia
  • Wilson diseaseDecreased serum ceruloplasmin and increased 24-hour urinary copper excretion

Answer

Primary biliary cholangitis matches with elevated titers of anti-mitochondrial antibodies (AMA). Primary sclerosing cholangitis matches with positive perinuclear anti-neutrophil cytoplasmic antibodies (p-ANCA). Autoimmune hepatitis (Type 1) matches with elevated titers of anti-smooth muscle antibodies (ASMA). Wilson disease matches with decreased serum ceruloplasmin.
Each specific chronic liver disease has a signature serological or biochemical marker that serves as a cornerstone for its initial diagnosis, allowing clinicians to differentiate between hepatocellular and cholestatic patterns of autoimmune and metabolic injuries.

Step-by-Step Solution

1
Analyze the characteristic autoantibody profile for middle-aged women presenting with pruritus and isolated alkaline phosphatase elevation.
Identify Primary biliary cholangitis as matching with anti-mitochondrial antibodies (AMA).
AMA is highly sensitive and specific for Primary biliary cholangitis.
2
Identify the primary serologic marker associated with biliary stricturing disease that frequently co-occurs with ulcerative colitis.
Match Primary sclerosing cholangitis with p-ANCA.
Up to 80% of patients with Primary sclerosing cholangitis have a positive p-ANCA, distinguishing it serologically from other cholestatic diseases.
3
Determine the autoimmune markers for hepatocellular injury patterns characterized by plasma cell infiltrates.
Match Autoimmune hepatitis with anti-smooth muscle antibodies (ASMA).
Type 1 AIH is classically associated with positive ASMA and anti-nuclear antibodies (ANA).
4
Identify the diagnostic biochemical abnormalities for a patient with neuropsychiatric symptoms and liver disease.
Match Wilson disease with decreased serum ceruloplasmin.
A defect in the ATP7B gene leads to impaired incorporation of copper into ceruloplasmin, lowering its serum levels.

Key Concept

Diagnostic laboratory and serologic markers for autoimmune and metabolic liver diseases
Estimated Time:1m 30s
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Topics

Gastroenterology and Hepatology

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