To investigate the feasibility, safety and effectiveness of laparoscopic partial nephrectomy for cystic tumor of the renal hilus.

The data of 6 patients with cystic tumor of renal hilus treated by laparoscopic partial nephrectomy in the three centers from January 2017 to December 2019 were analyzed retrospectively. There were 5 males and 1 females, with a median age of 45(10) years and body mass index of 23.3(1.5) kg/m², maximum tumor diameter 3.7(0.4) cm, the R.E.N.A.L score 8.5(1.0), the tumor stage was T1. The preoperative creatinine level was 68(12) μmol/L. The glomerular filtration rate (GFR) was 47.3(5.5) ml/min. The hemoglobin level was 138(17) g/L. The success rate, opening rate, operation time, artery blocking time, intraoperative bleeding volume, postoperative drainage tube retention days, postoperative complications, postoperative hospital stay days, renal function and tumor prognosis indexes of 6 patients were collected for statistical analysis.

Laparoscopic partial nephrectomy was successfully completed in all patients, and there was no conversion to open surgery or radical nephrectomy. The median operation time was 112(20) min, the renal artery occlusion time was 34(7) min, the intraoperative hemorrhage was 33(22) ml, and the postoperative hospital stay was 6.5(1.0) d. There were no postoperative complications such as bleeding and urinary leakage. Postoperative pathology showed 5 cases of renal malignant tumor and 1 case of renal cyst. The surgical margin was negative. The median creatinine was 81(12) μmol/L in 3 months after operation, which had no significant difference compared with that before operation (P>0.05). The GFR of kidney in 3 months after operation was 37.0(4.4) ml/min, which had significant difference compared with that before operation (P<0.05). The hemoglobin level was 127(15) g/L after operation, and the difference was statistically significant compared with that before operation. After 3 months follow-up, no tumor recurrence or metastasis was found in CT.

Laparoscopic partial nephrectomy is a feasible method for the patients with cystic renal carcinoma in the hilum of kidney, which is beneficial for the better protection of renal function and the exact perioperative effect.