Identify the defining serologic or biochemical marker that is most specific for diagnosing each of the following hepatobiliary conditions.
- Primary biliary cholangitisPositive anti-mitochondrial antibodies (AMA)
- Primary sclerosing cholangitisPositive perinuclear anti-neutrophil cytoplasmic antibodies (p-ANCA) and biliary stricturing
- Autoimmune hepatitisPositive anti-smooth muscle antibodies (ASMA) and elevated IgG
- Hereditary hemochromatosisSignificantly elevated transferrin saturation and HFE gene mutation
Cevap
Primary biliary cholangitis matches with anti-mitochondrial antibodies. Primary sclerosing cholangitis matches with p-ANCA. Autoimmune hepatitis matches with anti-smooth muscle antibodies. Hereditary hemochromatosis matches with elevated transferrin saturation and HFE gene mutation.
Each hepatobiliary disorder has a distinct pathophysiologic signature. Primary biliary cholangitis specifically targets intrahepatic ducts and is AMA-positive. Primary sclerosing cholangitis targets the entire biliary tree, causes stricturing, and is often p-ANCA positive. Autoimmune hepatitis is hepatocellular and ASMA-positive. Hereditary hemochromatosis is an iron metabolism disorder identified by high transferrin saturation and confirmed by HFE genotyping.
Adım Adım Çözüm
Anahtar Kavram
Autoantibodies and biochemical markers in hepatobiliary diseases
Tahmini Süre:45s