Aim: The aim of this study was to develop a risk scoring system specific to patients with bone metastasis of genitourinary cancer. Materials and Methods: This study included 180 patients with bone metastasis of three major types of genitourinary cancer: prostate cancer (n=111), renal cell carcinoma (n=43,), and urothelial carcinoma (n=26). Clinical factors at diagnosis of bone metastasis were evaluated to identify independent prognostic factors. Results: Multivariate analysis showed that type of primary cancer, poor performance status, the presence of visceral metastases, high Glasgow prognostic score and elevated neutrophil-to-lymphocyte ratio were independently predictive of poor prognosis. Patients were able to be classified by the prognostic risk score into four prognostic groups with low, intermediate, high, and very high risk. Conclusion: This risk scoring system could be useful for predicting survival of patients with bone metastasis of genitourinary cancer and in making decisions on appropriate treatments for them.
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