Although acute promyelocytic leukemia (APL) has been regarded as a serious medical emergency associated with disseminated intravascular coagulopathy or subsequent mortality, it is now considered a curable leukemia that is particularly sensitive to treatment with all-trans retinoic acid combined with chemotherapy. However, it is not clear whether additional chromosomal abnormalities in APL patients directly influence the prognosis or treatment response. ider(17)(q10)t(15;17)(q22;q21) has mostly been...