
Keywords: KPS، وضعیت کارنوفسکی; Age; Clinical feature; Outcome; Skull base chordomaCI, Confidence interval; K-M, Kaplan-Meier; KPS, Karnofsky Performance Status; MR, Magnetic resonance; OC, Occipitocervical; OS, Overall survival; PFS, Progression-free survival; REN, Signal intensity rat