Fig. 1

a Survival rates of the 18 patients with malignant bone or soft tissue tumors. The Kaplan–Meier method was used to generate survival curves. The 3-year survival rate was 61.36%. b Prognosis according to age. The Kaplan–Meier method was used to generate survival curves. The blue line represents the survival of younger patients (< 33 years). The red line represents the survival of older patients (≥ 33 years). The 3-year survival rates of the two groups were 60% and 56%, respectively. There was no significant difference in the 3-year survival rate based on age (P = 0.46). c Prognosis according to histological grade. The Kaplan–Meier method was used to generate survival curves. The blue line represents the survival of patients with low-grade sarcomas. The red line represents the survival of patients with high-grade sarcomas. The 3-year survival rates of the two groups were 100% and 42.8%, respectively. There was no significant difference in the 3-year survival rate based on tumor grade (P = 0.08)