Abstract：Objective:To explore the incidence of benign pathological results of partial nephrectomy in Chinese patients with preoperative diagnosis of renal malignancy and its predictors. Methods:We retrospectively analyzed the medical records of 2 087 patients with unilateral renal neoplasm postoperatively diagnosed as malignancy and undergoing open, robotic or laparoscopic partial nephrectomies from January 2008 to December 2015. 2087 patients were divided into groups according to gender, age, BMI, tumor size, and side. Chi-square test, logistic regression and other statistical methods were done to identify association of patient's gender, age, tumor size, other factors with benign lesions. Results:2 087 patients included 1 544 males (74.0%) and 543 females (26.0%), and the age of onset was 17 to 85 years (mean 51.3 ± 11.6 years). The tumor located on the left side had 999 cases, and 1 088 on the right side. The chi-square test showed that there was significant difference in the benign rate of gender group (P<0.001). Age, BMI and tumor size were statistically significant (P<0.05). The logistic binary regression analysis showed that age and sex were negatively correlated with the benign rate of tumor, and the tumor size was positively correlated with the benign rate. Conclusions:The postoperative benign probability of women, young age and large tumor is greater than other patients.
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