The primary objective of the study is to determine the progression-free survival [PFS] at 36 months for patients with Hodgkin lymphoma who achieve a complete metabolic response as demonstrated by a negative fluorodeoxyglucose (FDG)-PET scan after one cycle of ABVD (adriamycin, bleomycin, vinblastine, dacarbazine) who undergo abbreviated ABVD chemotherapy (3 cycles).