The Advances in Cancer Research series provides invaluable information on the exciting and fast-moving field of cancer research. This volume presents outstanding and original reviews on a variety of topics, including chromosome instability in cancer; telomerase inhibitors as an option for chemotherapy; avian retrovirus pathogenicity; Epstein-Barr virus and undifferentiated nasopharyngeal carcinoma; immunotherapy for prostate cancer; and the role of lymphocytes in anti-tumor immunity. The Advances in Cancer Research series provides invaluable information on the exciting and fast-moving field of cancer research. This volume presents outstanding and original reviews on a variety of topics, including chromosome instability in cancer; telomerase inhibitors as an option for chemotherapy; avian retrovirus pathogenicity; Epstein-Barr virus and undifferentiated nasopharyngeal carcinoma; immunotherapy for prostate cancer; and the role of lymphocytes in anti-tumor immunity.