When classifying tumors into tumor size <3 cm and ≥ 3 cm, the average KPS was discharged in two groups in the order of 76.36 ± 1.52 and 79.38 ± 0.62, statistical analysis showed no difference in the average Karnofsky score between the 2 groups (control non-parametric Wilcoxon P = 0.052 with> 0.05).