A prospective randomized clinical trial of treatment with vincristine, cyclophosphamide, methotrexate and 5-fluorouracil after conventional curative treatment for stage II breast cancer is described. The results at 2 years are recorded together with details of toxicity. Future plans are discussed briefly. Acknowledgement We wish to acknowledge the participation of all the collaborators in this study, the co-ordinator Dr. ERICA MANSBACHER and the support of Action Cancer in Belfast. References 1. Ahmann, D. L. , O'Connell, M. J. , Hahn, R. G. , Bisel, H. F. , Lee, R. A. , Edmonson, J. H. : An evaluation of early or delayed adjuvant chemotherapy in premenopause1 patients with advanced breast cancer undergoing oophorectomy. New Engl. J. Med. 297, 356-360 (1977) 2. Ahmann, D. L. , Scanlon, P. W. , Bisel, H. F. , Edmonson, J. H. , Frytak, S. , Payne, W. S. , O'Fallon, J. R. , Hahn, R. J. , Ingle, J. N. , O'Connell, M. J. , Rubin, J. : Repeated adjuvant chemotherapy with Phenyl-alanine mustard, or 5-Fluorouracil, Cyclophosphamide and Prednisone with or without radiation after mastectomy for breast cancer. Lancet 1978//, 893-896 3. Bonadonna, G. , Rossi, A. , Valagussa, P. , Banfi, A., Veronesi, U. : The CMF program for operable breast cancer with positive axillary nodes. Cancer 39, 2904-2915 (1977) 4. Edelstyn, G. A. , Bates, T. S. , Brinkley, D. , Macrae, K. D. , Spittle, M. , Wheeler, T. : Comparison of 5-day, I-day and 2-day cyclical combination chemotherapy in advanced breast cancer.
