A cell-based cancer vaccine consisting of hybrid cells created by electrofusing autologous dendritic cells (DCs) and allogeneic lymphoma cells with potential immunostimulating and antitumor activities. Upon administration, autologous lymphoma cell/allogeneic dendritic cell electrofusion hybrid vaccine may stimulate the immune system to mount a specific cytotoxic T-lymphocyte (CTL) response against specific autologous lymphoma-associated antigens, resulting in lymphoma cell apoptosis.