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The current study reports the clinical features and treatment outcome of 67 patients with acute promyelocytic leukemia (APL) treated at National Cancer Institute (NCI-Cairo), in Egypt from January 2007 to January 2011. The median age at presentation was 29 years. Bleeding was the most common presenting symptom (79%). Most patients had an intermediate risk Sanz score (49%) and 34% had a high risk score. The median follow-up time was 36 months. All evaluable patients were treated for induction with the simultaneous administration of all- trans  retinoic acid (ATRA) and an anthracycline. The original AIDA treatment protocol was modified due to resource limitations at the NCI-Cairo by replacing of idarubicin with daunorubicin or doxorubicin in most of the cases and the inclusion of cytarabine during the consolidation phase only in pediatric patients. All patients who achieved molecular complete remission after consolidation received two-year maintenance treatment with low dose chemotherapy composed of 6 mercaptopurine, methotrexate and intermittent ATRA courses. Five patients died before treatment initiation due to bleeding, three died during induction chemotherapy due to infectious complications (n=2) and bleeding (n=1) and one patient died during consolidation therapy due to infection. The main therapeutic complications during the induction phase were febrile neutropenia (42%), bleeding (18%) and differentiation syndrome (11%). All patients achieved molecular CR at end of consolidation therapy at a median time of 100 days. The 3-year OS was 89%. Two patients relapsed at 13 and 24 months, respectively. Adapting standard AIDA treatment protocols to limited resources by reducing dose-intensity during consolidation, using ATRA in the consolidation phase and alternative anthracyclin (doxorubicin) may be a valid treatment option for APL in developing countries. In spite of the increased incidence of high and intermediate risk disease in our cohort, we reported an acceptable CR rate, toxicity and OS.

CLINICAL FEATURES AND CLINICAL OUTCOME OF ACUTE PROMYELOCYTIC LEUKEMIA PATIENTS TREATED AT CAIRO NATIONAL CANCER INSTITUTE IN EGYPT