In general surgery, treatment has been undertaken with the use of laser beams. The authors have experienced 78 cancer patients (on 123 occasions) in the last five years. The present report refers to 31 patients (seen on 54 occasions) with advanced and recurrent cancer. The treatment was undertaken to improve or eliminate the symptoms and has been found effective in many of the patients. None of the patients subjected to laser treatment has shown any adverse effects as compared with irradiation.