In the Head and Neck Cancer Department of Cancer in Warsaw between August 1997 and September 1998 twenty patients with primary unresectable oral cavity cancer were referred for combined modality treatment with cisplatin based chemotherapy followed by wide resection (in the case of tumor regression) with immediate reconstruction and adjuvant radiotherapy. Tumor regression after chemotherapy was obtained in 15 patients and all of them were referred to surgery; wide resection and reconstruction using pectoralis major (PM) flap. 14 patients completed all treatment protocol, also with adjuvant radiotherapy. Tolerance of treatment was excellent and there was no influence of chemo- and radiotherapy for adaptation of PM flaps. During observation local recurrence was observed in two cases. Twelve patients are alive without evidence of disease. Study is continued.