- Determine whether patients with stage IA or IIA Hodgkin lymphoma who have a negative fludeoxyglucose F 18 positron emission tomography (FDG-PET) imaging after 3 courses of chemotherapy comprising doxorubicin hydrochloride, bleomycin sulfate, vinblastine, and dacarbazine (ABVD) require consolidation radiotherapy (to areas of previous involvement) in order to delay or prevent disease progression.