Fig. 3From: Identifying optimal candidates for postoperative adjuvant therapy among regional persistent/recurrent nasopharyngeal carcinoma patients after neck dissectionKaplan–Meier PFS curves in the original cohort. A Patients were grouped according to PLNs. B Patients were grouped according to ECS. C Patients were grouped according to preoperative plasma EBV DNA level. D Patients were grouped according to risk stratificationBack to article page