Fig. 1

Grading of intraoperative adhesions of perinephric fat. A 0 points: no adhesions, blunt dissection with clear boundary and rare bleeding; B 1 point: mild adhesions, blunt dissection with clear boundary and mild bleeding; C 2 points: moderate adhesions, blunt and sharp dissection with still clear boundary, and moderate bleeding; D 3 points: severe adhesions, sharp dissection with blurred boundary, and obvious bleeding, even requiring subcapsular dissection