Factors affecting survival and prognosis in surgically treated patients with spinal metastases arising from renal cell carcinoma

BACKGROUND: The objective of this study was to explore the prognostic factors for renal cell carcinoma (RCC) patients with spinal metastasis who underwent surgical treatment in our hospital. METHODS: We retrospectively analyzed the clinical data and survival status of 49 patients with spinal metastases arising from RCC. All patients with spinal metastases underwent surgical treatment. We analyzed a range of factors that may affect the prognosis of patients with RCC. Using Kaplan-Meier method to perform univariate analysis of the factors that might affect spine metastasis free survival (SMFS)and survival after spinal metastasis (OS) respectively. Establish Cox proportional hazards model to extract independent prognostic factors for SMFS and OS. RESULTS: The mean time of SMFS was 27 months (median 8, range 0–180 months). The mean time of OS was 12.04 months (median 9, range 2–36 months). RCC with visceral metastasis (p = 0.001,HR 11.245,95%CI 2.824–44.776) and AJCC RCC Stage (p = 0.040,HR 2.809,95%CI 1.046–7.543) can significantly affect SMFS. Furthermore, WHO/ISUP Grade (p < 0.001, HR 2.787,95%CI 1.595–4.870), ECOG Score (p = 0.019, HR 0.305,95%CI 0.113–0.825) and multiple spinal metastases (p < 0.001, HR 0.077,95%CI 0.019–0.319) have significant effects on OS. CONCLUSIONS: RCC with visceral metastasis and AJCC RCC Stage were independent prognostic factors for SMFS. WHO/ISUP Grade, ECOG Scores and multiple spinal metastases were independent prognostic factors for OS.