Assess whether the following will improve CR rate without increasing toxicity in high-risk untreated acute promyelocytic leukemia (APL):
1) initiation of arsenic trioxide (ATO) on day 1, rather than day 10, of therapy,
and
2) administration of gemtuzumab ozogamycin (GO) if the WBC rises to > 10,000 after start of treatment at the descretion of the treating physician |