Two cases of fatal transfusion-associated bacterial sepsis provoked by Providencia rettgeri.

used for thyroid disease could generate a chromosomal aberration, particularly (t 9,22) (q34 q11) developing, with a long latency, CML or in this case Ph+ ALL. Although the risk of leukemia after 131I exposure cannot be considered a contraindication to 131I therapy, strict hematologic follow-up of patients submitted to 131I treatment is recommended. Retrospective analysis of 131I exposure in large leukemia registries may also be worthwhile.