Fig. 3From: Minimally invasive surgery alone compared with intensity-modulated radiotherapy for primary stage I nasopharyngeal carcinomaKaplan–Meier curves of overall survival (a), local relapse-free survival (b), regional relapse-free survival (c) and distant metastasis-free survival (d) for stage I NPC patients with ENPG and IMRT. ENPG endoscopic nasopharyngectomy, IMRT intensity modulated radiation therapyBack to article page