Frontline Oral Arsenic Trioxide for APL

"Patients will be recruited to oral arsenic trioxide, all-trans-retinoic acid, ascorbic acid (AAA) based-induction for 42 days. Daunorubicin or idarubicin will only be used during induction in patients \<65 with presenting white blood cell count (WBC) ≥ 10 x 10\^9/L. In patients not receiving daunorubicin, hydroxyurea if WBC ≥ 5 x 10\^9/L within the first 14 days of induction. A reassessment bone marrow aspirate will be performed on day 28 of induction for assessment of morphologic remission.~Four weeks after the completion of induction phase, all patients, regardless of initial WBC, will receive two cycles of chemotherapy-free AAA consolidation (14 days every 28 days).~Four weeks after completion of consolidation, all patients will receive 12 cycles of chemotherapy-free AAA maintenance (14 days every 8 week)."