====== Alpha-1 antitrypsin, serum ====== Late neonatal intracranial haemorrhage ==== Notes ==== * Alpha-1-antitrypsin (AAT) deficiency is a rare genetic disorder characterized by hepatitis in neonates, childhood and adulthood (protease inhibitor (PI)*ZZ) and emphysema with or without hepatitis (PI*ZZ)/(PI*SS,SZ or null) in adulthood[(:cite:20811907>{{pmid>long:20811907}})]. * AAT deficiency is a rare genetic disorder that can lead to a serious bleeding disorder in the neonatal period if not recognised on time ==== References ==== ~~REFNOTES~~ {{tag>labtests}}