OUTLINE: This is a randomized multicenter study. Patients are randomized to receive either vincristine/doxorubicin/prednisolone/etoposide/cyclophosphamide/ bleomycin (VAPEC-B) chemotherapy and involved field radiotherapy or mantle radiotherapy only. Patients receiving VAPEC-B are given prednisolone daily on weeks 1-6, doxorubicin IV along with cyclophosphamide IV on week 1, doxorubicin IV and etoposide orally for 5 days on week 3, and vincristine and bleomycin IV on weeks 2 and 4. Involved field radiotherapy is commenced at week 6, within 14 to 21 days of the last chemotherapy treatment. Patients randomized to receive mantle radiotherapy only are given treatments daily for 4 weeks. Patients are followed every 3 months for the first two years, every 4 months for the third year, every 6 months for the fourth and fifth years and annually thereafter.