 CONSOLIDATION THERAPY: Patients receive tretinoin PO BID on days 1-14 and 29-42 and arsenic trioxide IV over 2-4 hours on days 1-5, 8-12, 15-19, and 22-26. Treatment repeats every 56 days for up to 3 courses in the absence of disease progression or unacceptable toxicity. Patients then receive tretinoin PO BID on days 1-14 and arsenic trioxide IV over 2-4 hours on days 1-5, 8-12, 15-19, and 22-26. 