Salvage stereotactic reirradiation using the CyberKnife for the local recurrence of nasal or paranasal carcinoma

Salvage stereotactic reirradiation using CyberKnife is feasible and effective for the local recurrence of nasal and paranasal carcinomas. To further improve treatment outcomes, exploration of better planning and dose fractionation, as well as combination chemotherapy would be worthwhile.