Diabetes mellitus is the only independent predictor of both postoperative and long term renal functions in elective laparoscopic partial nephrectomy with limited or overextended warm ischemia.

Overextended WIT (≥40 minutes) caused significant postoperative renal functional loss in elective LPN but this functional loss recovers at long term follow-up. However, diabetes mellitus is the only predictor of renal functional loss both in the postoperative period and at the last follow-up.