Fig. 2From: Forty-six cases of nasopharyngeal carcinoma treated with 50 Gy radiotherapy plus hematoporphyrin derivative: 20 years of follow-up and outcomes from the Sun Yat-sen University Cancer CenterThe Kaplan–Meier estimated survival curves of the 46 patients with NPC. a overall survival; b local recurrence-free survival; c distant metastasis-free survival; and d disease-free survivalBack to article page