[Prolonged jaundice by heterozygous alpha-1-antitrypsin-deficience? (author's transl)].

Of 28 newborns with prolonged jaundice and lowered or subnormal values of alpha-1-antitrypsin in the serum six patients were found to have a Pi-type MZ, three a Pi-type MS and one patient a Pi-type MP. One of the newborns had Pi-type SZ (double heterozygous), one infant was a homozygous carrier of the Pi-type S. It seems to the possible that one of the reasons for the not yet explained cases of prolonged jaundice of the newborns period can be found in the high frequency of homozygous or heterozygous genotype carriers of Pi-system.