Abstract:Objective To investigate the application of modified DAP scoring system in laparoscopic partial nephrectomy (LPN) for T1 renal cell carcinoma (RCC). Methods A total of 179 RCC patients were preoperatively evaluated by DAP and modified DAP scoring systems. Both scores were compared with the actual difficulty of LPN and perioperative related factors. Results The actual operation difficulty was compatible for modified DAP (P>0.05) but not for DAP scores (P<0.05). The modified DAP scores were associated with operative time, intraoperative warm ischemia time and pre/postoperative hemoglobin (P<0.05) and not with pre/postoperative creatinine, postoperative drainage tube indwelling time and postoperative hospital stay (P>0.05). Conclusion The modified DAP scoring system is superior to DAP scoring system in predicting the difficulty of LPN in patients with T1 RCC, such as operation time, renal warm ischemia time and blood loss.