The main difference between laryngeal cancer and pharyngeal cancer lies in the different parts they affect. Laryngeal cancer occurs below the level of the epiglottis, while pharyngeal cancer generally occurs above this level, including tumors in the pharynx, tonsils, and base of the tongue, whereas laryngeal cancer primarily involves the vocal cords and the lower pharynx. For the diagnosis and treatment of pharyngeal and laryngeal cancers, we can use nasoendoscopy, paranasal sinus CT scan, and CT scan of the larynx among other examinations to make a clear diagnosis, and a pathological biopsy for final confirmation. Once diagnosed, it is usually necessary to surgically remove the tumor promptly to achieve a cure.