This paper compares the effectiveness of laser, cryosurgery and microwave in the treatment of advanced recurrent breast carcinomas and sarcomas. An effective rate of 37% (17/46) has been found. Of which 3 cases have no evidence of recurrence for over 2 years, 2 cases over 1 year. On the basis of the anti-cancerous mechanisms of the three physical methods of therapy, the authors discuss the merits and indications of laser as compared to the other two methods.