Statistical methods
PRIMARY TUMOR, REGRESSION, METASTASIS
All data were analyzed using SPSS version 20.0 software (IBM Corp., Armonk, N.Y., USA). A All patients in this group were scored using the KPS scoring system before and 1 month after the operation, and a Univariate analysis (Kaplan–Meier analysis) was conducted. Patients were divided into groups according to sex, age, location, KPS score, VAS score, primary tumor growth, organ metastasis, and surgical method. Univariate survival analysis was performed between the groups and the Kaplan–Meier method was used to analyze the survival time of patients and determine whether each factor affected survival time.For each prognostic factor (sex, age, location, KPS score, VAS score, primary tumor growth, organ metastasis, and surgical method), a multivariate Cox proportional hazards regression model was used.