Fig. 2From: Impact of postoperative daily image-guided intensity-modulated radiotherapy on overall and local progression-free survival in patients with oral cavity cancerThe actuarial 5-year Kaplan–Meier curves for overall survival curve according to risk factors in patients with postoperative oral cavity cancer patients treated with intensity-modulated radiation therapy (IMRT) or helical tomotherapy (HT), with or without concurrent chemotherapy. a positive resection-margin; b positive extracapsular spread (ECE); c positive perineural invasion (PNI); d positive lymphovascular space involvement (LVSI); e two or more positive lymph nodes; f T3,4Back to article page