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Difficulty: MediumGastroenterology and Hepatology

Match each chronic liver disease to its classic serologic marker, genetic association, or histopathologic finding.

  • Primary Biliary Cholangitis (PBC)Characterized by anti-mitochondrial antibodies (AMA) and non-suppurative granulomatous destruction of small intrahepatic bile ducts.
  • Primary Sclerosing Cholangitis (PSC)Strongly associated with ulcerative colitis, characterized by alternating strictures and dilations of the biliary tree and p-ANCA positivity.
  • Autoimmune Hepatitis (AIH)Characterized by elevated IgG levels and the presence of anti-smooth muscle or anti-liver/kidney microsomal type 1 antibodies.
  • Hereditary HemochromatosisAutosomal recessive disorder caused by HFE gene mutations, leading to excessive intestinal iron absorption and multiorgan deposition.

Answer

Primary Biliary Cholangitis matches with AMA and intrahepatic duct destruction; Primary Sclerosing Cholangitis matches with ulcerative colitis and biliary stricturing; Autoimmune Hepatitis matches with elevated IgG and ASMA; Hereditary Hemochromatosis matches with HFE gene mutations.
Each liver disease has a distinct pathophysiologic mechanism and diagnostic marker profile that allows for accurate matching. Accurate diagnosis relies on combining serology (e.g., AMA for PBC, ASMA for AIH), genetic testing (HFE for hemochromatosis), and recognizing associated clinical conditions (ulcerative colitis for PSC).

Step-by-Step Solution

1
Identify the distinguishing features of Primary Biliary Cholangitis (PBC).
Matches with anti-mitochondrial antibodies (AMA) and intrahepatic duct destruction.
AMA is the hallmark serologic marker for PBC, which selectively damages small intrahepatic ducts.
2
Identify the clinical associations for Primary Sclerosing Cholangitis (PSC).
Matches with ulcerative colitis, biliary stricturing, and p-ANCA positivity.
PSC is uniquely associated with inflammatory bowel disease and affects both intra- and extrahepatic ducts.
3
Identify the diagnostic criteria for Autoimmune Hepatitis (AIH).
Matches with elevated IgG levels and anti-smooth muscle or anti-LKM1 antibodies.
These specific autoantibodies and elevated immunoglobulins confirm the hepatocellular autoimmune process.
4
Identify the genetic basis of Hereditary Hemochromatosis.
Matches with HFE gene mutations and excessive iron absorption.
Hemochromatosis is an inherited disorder leading to toxic iron deposition due to unregulated absorption.

Key Concept

Autoimmune and genetic liver diseases are differentiated by their specific autoantibody profiles, genetic markers, and patterns of hepatobiliary injury.
Estimated Time:1m 30s
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Topics

Gastroenterology and Hepatology

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