3. All patients with Rai stage III-IV are eligible. - OR - Patients with Rai stage 0-II who meet one or more indication for treatment as defined by the NCI-sponsored Working Group are eligible:Massive or progressive splenomegaly; Massive lymph nodes, nodal clusters, or progressive lymphadenopathy; Grade 2 or 3 fatigue, fever >/= 100.5 degrees F, night sweats for > 2 weeks w/o documented infection, presence of weight loss >/= 10% over the preceding 6 months; Progressive lymphocytosis with increase in lymphocyte count of >/= 50% over a 2-month period or an anticipated doubling time of < 6 months.