Laryngeal cancer remains one of the most common head and neck tumors. In the treatment of this disease, it is important to assess the overall survival when using transoral СО 2 laser microsurgery. The aim of the research was to make an evaluation of treatment of patients with laryngeal cancer undergoing CO 2 laser transoral microsurgery. Fifty patients aged 40-82 years (average age 58.7 years) with early-stage laryngeal cancer were treated with СО 2 laser transoral microsurgery at the National ENT hospital from January 2012 to August 2014.Tumors at the T1aN0M0 stage were detected in 68%, T1bN0M0 in 14%, T2N0M0 in 18%. Overall survival was 87.1 ± 2.3 months, and 5-year survival was 92%. The survival rate depending on the type of surgical intervention Type III, Type IV, Type Va, Type Vb, Type Vc was 93, 94, 100, 100, and 100%, respectively. The survival rate depending on the stage T1aN0M0 was 91%, on the stage T1bN0M0 was 100%, on the stage T2N0M0 was 88%. Transoral СО 2 laser microsurgery shows ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 20 (1): gmr18734 L.M. Ky et al. 2 excellent results in laryngeal tumors, especially in the T1aN0M0 stage, making it possible to perform surgery in more comfortable conditions; it provides high survival rates, excellent cosmetic and functional results compared to classical open access, without compromising immediate and long-term treatment results.