As Otolaryngologists - Head and Neck Surgeons - Fifth Avenue Otolaryngologists are involved in the medical and surgical treatment of both pediatric and adult diseases of the ear (including traumatic and cancerous disorders of the external, middle, and inner ear), cancer and tumor surgery of the head and neck, sinus and nasal disease including endoscopic sinus surgery, smell and taste disorders, thyroid disease, cosmetic and reconstructive head and neck surgery, vocal cord tumors and voice disorders, sleep disorders, snoring, hearing disorders, and hearing aids.