title: Acute leukaemia in siblings.
abstract: Unequivocal lymphoblastic leukaemia in a 4-year-old boy was followed 3 years later by equally unequivocal myeloblastic leukaemia in his 20-year-old brother. The boy achieved complete remission and remains well more than 6 years later whereas his brother failed to respond to treatment and died after 5 months. The parents and 3 remaining siblings showed no recognized features suggesting a constitutional predisposition to leukaemia despite thorough investigation.
mesh_terms: D000208:Acute Disease; D000328:Adult; D002675:Child, Preschool; D006801:Humans; D007938:Leukemia / Q000235:genetics*; D007945:Leukemia, Lymphoid / Q000235:genetics; D015470:Leukemia, Myeloid, Acute / Q000235:genetics; D008297:Male