OUTLINE: This a two step, stratified, randomized study. Patients are stratified for arms I and II (step 1) by age (under 60 vs 60 and over), tumor burden (high vs low), histology (follicular vs other), and B symptoms (present vs absent). After arms I and II have been completed, patients are stratified in arms III and IV (step 2) by extent of residual disease (minimal vs gross), histology (follicular vs other), and initial tumor burden.