Fig. 1From: 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 CenterFlow chart of nasopharyngeal carcinoma (NPC) patient selection. RT radiotherapy; HPD hematoporphyrin derivatives; CT computed tomography; PR partial response; CR complete responseBack to article page