摘要目的:探讨肾癌骨转移患者的临床特征及其预后因素。方法:纳入2009年8月至2017年8月北京积水潭医院收治的初诊为肾癌骨转移患者的临床资料。收集患者的性别、年龄、骨转移发生的时间、骨转移部位、骨转移数目、有无合并内脏转移以及病理类型。对患者进行规律随访，Kaplan-Meier法分析不同特征患者的生存曲线，采用Cox比例风险回归模型进行多因素分析。结果:共纳入肾癌骨转移患者51例，年龄38~76（58.6±8.2）岁，其中男39例（76.5%），女12例（23.5%），男女患者比例3.25∶1。随访8~109个月，中位随访30个月，随访率90.2%。截至末次随访共31例（60.8%）患者死亡，患者中位总生存期（OS）25个月。单发骨转移患者26例（51.0%），中位OS为38个月；骨转移灶≥2个的患者25例（49.0%），中位OS为20个月，两组间差异有统计学意义（ P=0.021）。仅中轴骨转移患者22例（43.1%），中位OS为30个月；仅四肢骨转移患者19例（37.3%），中位OS为69个月；中轴和四肢骨均转移患者10例（19.6%），中位OS为17个月，组间比较差异有统计学意义（ P=0.012）。有内脏转移患者15例（29.4%），中位OS为22个月；无内脏转移患者36例（70.6%），中位OS为38个月，两组间差异有统计学意义（ P=0.007）。多因素Cox回归分析显示，骨转移数目（ HR=3.130，95 %CI：1.502~6.520， P=0.035）及内脏转移（ HR=4.699，95 %CI：1.810~9.545， P=0.001）是肾癌骨转移患者的独立预后因素。 结论:单发骨转移、无内脏转移为肾癌骨转移患者预后良好因素，对于此类患者可行骨转移灶根治性切除来提高生存率。

abstractsObjective:To determine the status of bone metastasis (BM) and prognosis factors of patients with renal cell carcinoma (RCC) in our center.Methods:The clinical and medical records of RCC patients with BM, who were admitted to the Department of Urology, Bone Oncology and Spine Surgery, Beijing Jishuitan Hospital from August 2009 to August 2017 were collected. The gender, age, time of BM, location of BM, numbers of BM, presence or absence of visceral metastasis, pathological types of BM were investigated. The patients were followed up regularly, and the survival curves were analyzed by Kaplan-Meier method. Cox proportional hazard regression model was used to estimate the prognostic factors.Results:A total of 51 RCC patients with bone metastasis were collected. The age of patients ranged from 38 to 76 (58.6±8.2) years old, including 39 males (76.5%) and 12 females (23.5%). The ratio of male to female was 3.25∶1. The patients were followed up for 8 to 109 months, with a median follow-up time of 30 months. The follow-up rate was 90.2%. Thirty-one (60.8%) patients died at the last follow-up, with a median overall survival (OS) time of 25 months. The median OS was 38 months and 20 months in the solitary BM group (26 cases, 51.0%) and BM ≥ 2 group (25 cases, 49.0%), respectively. The difference between the two groups was statistically significant ( P=0.021). The median OS was 30 months, 69 months and 17 months in the axis BM group (22 cases, 43.1%), appendicular BM group (19 cases, 37.3%) and both the axis and appendicular BM group (10 cases, 19.6%), respectively. The difference between the groups was statistically significant ( P=0.012). The median OS was 22 months and 38 months in the patients with (15 cases, 29.4%) and without (36 cases, 70.6%) visceral metastases groups, respectively. The difference between the two groups was statistically significant ( P=0.007). Univariate and multivariate Cox regression analysis showed that the numbers of BM ( HR=3.130, 95 %CI: 1.502-6.520, P=0.035) and visceral metastasis ( HR=4.699, 95 %CI: 1.810-9.545, P=0.001) were independent prognostic factors for RCC with BM. Conclusions:Solitary BM, no visceral metastasis are good prognostic factors for RCC with BM. For these patients, radical resection of BM is feasible to improve survival rate.