Fig. 4From: Benefits of local tumor excision and pharyngectomy on the survival of nasopharyngeal carcinoma patients: a retrospective observational study based on SEER databaseTreatment trend of NPC. Trend of nonsurgery (a) and surgery (b) in all patients (line), patients with radiation (dot line) and patients without radiation (dash line). c Trend of local tumor excision in all patients (line), patients with radiation (dot line) and patients without radiation (dash line). d Trend of pharynectomy in all patients (line), patients with radiation (dot line) and patients without radiation (dash line)Back to article page