OUTLINE: This is a multicenter study. Patients are stratified according to prior response to treatment (refractory vs recurrent vs post marrow transplant). Patients receive tretinoin liposome IV over 30 minutes every other day for 28 days. Treatment continues every 28 days for a total of 6 courses in the absence of disease progression or unacceptable toxicity. Patients who are eligible for stem cell or marrow transplant receive at least 2 courses before crossing over to transplant. Patients are followed every 3 months.