- Group 1 (favorable prognosis): Patients receive ABVD chemotherapy comprising doxorubicin hydrochloride IV, bleomycin sulfate IV, vincristine sulfate IV, dacarbazine IV, and methylprednisolone IV on days 1 and 14. Treatment repeats every 28 days for 2 courses. Patients then undergo PET scan for evaluation of response. Patients receive additional treatment according to response.