Abstract
The incidence and pattern of secondary neoplasms in patients with acute promyelocytic leukemia (APL) treated with all-trans retinoic acid (ATRA)-containing regimens is not well described. We compared 160 patients with APL treated with ATRA plus idarubicin (n = 54) or ATRA plus arsenic trioxide (ATO) (n = 106) for the incidence of secondary cancers per unit time of follow-up. Median follow-up times for the two cohorts were 136 and 29 months, respectively. Nine patients developed secondary cancers in the chemotherapy group. These included two breast cancers, three myelodysplastic syndromes/acute myeloid leukemia, one vulvar cancer, one prostate cancer, one colon cancer and one soft tissue sarcoma. A melanoma and one pancreatic cancer developed in the ATO group. We conclude that treatment of patients with APL using the non-chemotherapy regimen of ATRA plus ATO is not associated with a higher incidence of secondary cancers (p = 0.29) adjusted for unit time of exposure.
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