Relapse of leukemia after prolonged remission.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007945:Leukemia, Lymphoid / Q000150:complications*; D015470:Leukemia, Myeloid, Acute / Q000150:complications*; D008297:Male; D013997:Time Factors