Prognostic Significance of Preoperative Inflammatory Biomarkers and Traditional Clinical Parameters in Patients with Spinal Metastasis from Clear Cell Renal Cell Carcinoma: A Retrospective Study of 95 Patients in a Single Center

Kehan Xu,1,* Jialin Li,1,* Mengzi Hu,2,* Hao Zhang,1 Jian Yang,1 Haiyi Gong,1 Bo Li,1 Wei Wan,1 Jianru Xiao1 1Department of Orthopedic Oncology, Changzheng Hospital, Second Military Medical University, Shanghai 200003, People’s Republic of China; 2Department of Orthopedics, Xuzhou Central Hospital, Xuzhou, Jiangsu 221009, People’s Republic of China*These authors contributed equally to this workCorrespondence: Jianru Xiao; Wei Wan Email jianruxiao83@smmu.edu.cn; ggflyfish@126.comPurpose: The purpose of this retrospective study was to identify preoperative inflammatory biomarkers and clinical parameters and evaluate their prognostic significance in patients with spinal metastasis from clear cell renal cell carcinoma (CCRCC).Patients and methods: Correlations of overall survival (OS) with traditional clinical parameters and inflammatory indicators including the neutrophil–lymphocyte ratio (NLR), platelet–lymphocyte ratio (PLR), lymphocyte–monocyte ratio (LMR), albumin–globulin ratio (AGR), and C-reactive protein to albumin ratio (CRP/Alb ratio) were analyzed in 95 patients with spinal metastasis from CCRCA using the Kaplan–Meier method to identify potential prognostic factors. Factors with P values ≤ 0.1 were subjected to multivariate analysis by Cox regression analysis. P values ≤ 0.05 were considered statistically significant.Results: The 95 patients included in this study were followed up by a mean of 48.8 months (median 51 months; range 6–132 months), during which 21 patients died, with a death rate of 22.1%. The statistical results indicated that patients with total piecemeal spondylectomy (TPS), targeted therapy, NLR < 3.8 and PLR < 206.9 had a significantly longer OS rate.Conclusion: TPS and targeted therapy could significantly prolong the OS of patients with spinal metastasis from CCRCC. In addition, NLR and PLR are robust and convenient prognostic indicators that have a discriminatory ability superior to other inflammatory biomarkers.Keywords: clear cell renal cell carcinoma, spinal metastasis, overall survival, prognosis, inflammatory biomarkers