title: Blood chimeric twins: an example of blood cell chimerism.
abstract: A man and his twin sister were found to have two types of circulating red cells. The man had 89% A1 cells of his own and 11% A1B cells derived from his sister. The woman had 12% A1B cells of her own and 88% A1 cells derived from her brother. The two lines of red cells also had different Duffy and Kidd groups. The lymphocyte karyotype in the brother was 68% XY and 32% XX, and that in the sister was 60% XX and 40% XY. The possible mechanisms for producing different proportions of red cells and lymphocytes are discussed.
mesh_terms: D000017:ABO Blood-Group System; D000293:Adolescent; D002678:Chimera; D002875:Chromosomes; D004375:Duffy Blood-Group System; D005260:Female; D006801:Humans; D007621:Karyotyping; D007667:Kidd Blood-Group System; D008214:Lymphocytes / Q000648:ultrastructure; D008297:Male; D009030:Mosaicism; D010375:Pedigree; D011247:Pregnancy; D012730:Sex Chromosomes; D014427:Twins; D014429:Twins, Dizygotic
chemical_list: D000017:ABO Blood-Group System; D004375:Duffy Blood-Group System; D007667:Kidd Blood-Group System