Conservation surgery is a strategy and philosophy of larynx cancer surgery that focuses not only on radicality with respect to removal of cancer, but also on being conservative concerning sparing of normal laryngeal structures, so as to preserve voice, swallowing, and breathing, and to avoid total laryngectomy and/or chemotherapy and radiation. Special training and experience are required especially for advanced conservation operations, both laser (through the mouth) and non-laser (through an incision on the neck).