t1t2t3 glottic tumors fifteen years experience with co2 laser this research aims at reporting the results of endoscopic treatment of glottic carcinomas by co2 laser the cases cited concern 516 patients with glottic t1t2t3 carcinomas the patients have been divided into 5 groups a t1a 194 patients with monolateral carcinoma involving the true vocal cord who underwent simple cordectomy b t2a 104 patients with monolateral cordal carcinoma involving the ventricle and the false cord c t1b 127 cases of monolateral or bilateral carcinoma involving the anterior commissure d these patients underwent bilateral cordectomy t2b 54 cases of monolateral or bilateral carcinomas involving the anterior commissure and extending to the hypoglottic or supraglottic region in these patients a bilateral extended cordectomy was performed e t3 37 selected cases of monolateral or bilateral cordal carcinoma with fixed vocal cord fixity was due to the substantial size of the tumor or to the infiltration of the paraglottic space these patients underwent a monolateral or bilateral extended cordectomy the following are the results at 5 years group a overall observed survival rate osr was 79 and the adjusted survival rate asr 945 group b osr 67 and asr 77 group c osr 884 and asr 965 group d osr 82 and asr 90 group e osr 55 and asr 67 the above data are evidence of the fact that our surgical techniques offer similar or better advantages in terms of survival rate compared to the traditional procedures it must be noted that endoscopic surgery of glottic tumors carried out by co2 laser offers relevant benefits when compared with traditional surgery i rapidity of operation and reduced surgical trauma ii the possibility of avoiding tracheotomy iii the respect of the integrity of the cartilaginous skeleton iv short postoperative course and low incidence of complication v better functional results vi a shorter stay in hospital with positive psychological effects on the patients and lower social costs