Alpha-1 antitrypsin deficiency is a hereditary metabolic disorder predisposing its carrier to lung and liver damage. Organ damage results from decreased secretion of alpha-1 antitrypsin from hepatocytes to circulation, caused by a genetic mutation. Decreased alpha-1 antitrypsin level predisposes to early-onset pulmonary emphysema. Unsecreted alpha-1 antitrypsin accumulating into hepatocytes may in turn lead to an inflammatory reaction, increase in fibrous tissue and finally to liver cirrhosis.