Laryngoscopy and CT do not exist as to which is more accurate in terms of diagnosis, and usually complement each other to make the disease diagnostic power higher. Laryngoscopy can directly observe the tissues of the larynx and clearly observe the surface swelling of the larynx as well as the size, extent, and mobility of the vocal cords, but it cannot detect submucosal swellings. CT, on the other hand, can detect the surface swelling and also the submucosal swelling as well as the relationship between the swelling and the surrounding tissues and the extent of infiltration, but not the vocal folds and laryngeal cartilage activity. Therefore, for laryngeal diseases both laryngoscopy and CT of the larynx need to be examined to ensure the detection of hidden masses and to improve the diagnosis rate.