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Difficulty: MediumGastroenterology and Hepatology

Match each brief clinical presentation of a hepatobiliary disorder to its most specific diagnostic laboratory or imaging finding.

  • A 45-year-old woman with Hashimoto thyroiditis presents with severe pruritus without a rash and progressive fatigue; laboratory studies show an isolated, significantly elevated alkaline phosphatase.Elevated serum titer of anti-mitochondrial antibodies
  • A 35-year-old man with a history of bloody diarrhea and tenesmus presents with jaundice and right upper quadrant aching; labs show an elevated alkaline phosphatase and mild transaminase elevation.Multifocal stricturing and dilation of both intrahepatic and extrahepatic bile ducts on magnetic resonance cholangiopancreatography
  • A 28-year-old woman presents with fatigue, amenorrhea, and jaundice; labs reveal an AST of 850 U/L, ALT of 920 U/L, and elevated total IgG levels.Elevated serum titers of anti-smooth muscle antibodies and/or anti-nuclear antibodies
  • A 54-year-old man presents with polyuria, polydipsia, erectile dysfunction, and generalized joint pains; physical examination reveals hyperpigmented skin.Elevated serum transferrin saturation and positive HFE gene mutation testing

Answer

Primary Biliary Cholangitis matches with anti-mitochondrial antibodies; Primary Sclerosing Cholangitis matches with MRCP findings; Autoimmune Hepatitis matches with anti-smooth muscle antibodies; Hemochromatosis matches with elevated transferrin saturation.
Each vignette represents a classic presentation of a hepatobiliary disease. The middle-aged woman with pruritus and isolated elevated alkaline phosphatase has Primary Biliary Cholangitis (diagnosed via AMA). The man with ulcerative colitis and cholestasis has Primary Sclerosing Cholangitis (diagnosed via MRCP showing strictures). The young woman with severe transaminitis and hypergammaglobulinemia has Autoimmune Hepatitis (diagnosed via ASMA). The man with diabetes, skin pigmentation, and arthropathy has Hereditary Hemochromatosis (diagnosed via elevated transferrin saturation and HFE gene testing).

Step-by-Step Solution

1
Analyze each clinical vignette to establish the most likely underlying diagnosis based on demographics, symptoms, and initial lab patterns.
Identified diagnoses are Primary Biliary Cholangitis (PBC), Primary Sclerosing Cholangitis (PSC), Autoimmune Hepatitis (AIH), and Hereditary Hemochromatosis.
Accurate identification of the syndrome is a prerequisite to selecting the specific confirmatory test.
2
Match the cholestatic presentation in the middle-aged woman with autoimmune history to its serological marker.
The PBC vignette pairs with anti-mitochondrial antibodies.
AMA is highly sensitive and specific for PBC, which destroys small intrahepatic bile ducts.
3
Match the cholestatic presentation in the young man with inflammatory bowel disease to its diagnostic standard.
The PSC vignette pairs with multifocal stricturing and dilation on MRCP.
PSC affects medium and large bile ducts, leading to characteristic imaging findings that are required for diagnosis.
4
Match the severe hepatocellular injury presentation with high IgG to its associated autoantibodies.
The AIH vignette pairs with anti-smooth muscle antibodies and/or anti-nuclear antibodies.
AIH causes acute or chronic hepatocellular injury mediated by autoimmune mechanisms, marked by ASMA/ANA positivity.
5
Match the multi-system metabolic presentation (diabetes, skin changes, arthropathy) to its diagnostic markers.
The Hemochromatosis vignette pairs with elevated transferrin saturation and HFE gene mutation testing.
Hemochromatosis is an iron overload syndrome best screened initially with transferrin saturation and confirmed genetically.

Key Concept

Diagnostic markers for autoimmune and metabolic liver diseases
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Topics

Gastroenterology and Hepatology

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