[Clinical outcomes after non-ischemic partial nephrectomy for clinical T1 renal tumors using soft coagulation versus microwave tissue coagulation].

Abstract We have performed non-ischemic partial nephrectomy for clinical T1 renal tumors using microwave tissue coagulation (MTC group) or soft coagulation (soft coagulation group). The clinical outcomes were retrospectively compared between the two groups. A total of 36 patients were analyzed in this study (22 in the MTC group and 14 in the soft coagulation group). The anatomical characteristics of the renal tumors were assessed using the R.E.N.A.L Nephrometry Score. Renal function was assessed by the estimated glomerular filtration rate. The preoperative estimated glomerular filtration rate was 72.1 ml/min in the MTC group and 65.6 ml/min in the soft coagulation group (p = 0.05). The R.E.N.A.L Nephrometry Score was not significantly different between the two groups. Clavian grade > or = 2 postoperative complications occurred in one patient (4.5%) in the MTC group and one patient (7.1%) in the soft coagulation group. Postoperative local recurrence and distant metastasis occurred in one patient (8.3%) in the soft coagulation group and no patients in the MTC group, which was not a significant difference between the two groups. The median postoperative decrease in estimated glomerular filtration rate was 11.5% in the MTC group and 3.6% in the soft coagulation group. Postoperative renal preservation tended to be better in the soft coagulation group than in the MTC group, but this difference was not significant. The use of soft coagulation in non-ischemic partial nephrectomy for the treatment of clinical T1 renal tumors is as effective as that of MTC.