“…The occurrence of more than one case of AIHA in the same family is, however, most unusual, but it has happened. The author (Dacie, 1969) reported that he had encountered only one example – a sister and brother – out of more than 100 cases of AIHA seen up to that time. Writing in 1992, he was, however, able to list 20 published descriptions of the occurrence of AIHA in more than one family member, included in the relationships were four pairs of twins.…”