Alpha1-Antitrypsin
(AAT)

Alternate Names

  • A
  • AT
  • Alpha1-Antitrypsin Phenotyping

AAT is an enzyme whose levels fluctuate in response to either inherited or acquired diseases. AAT deficiency is seen in emphysema, and in children with cirrhosis and other liver diseases. AAT levels are increased in infection, inflammation, or malignant cancers. AAT levels are not disease-specific; AAT phenotyping allows for a more specific diagnosis to be made.

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