Materials and Methods: Our health center"s archive system was scanned retrospectively for the time interval between January 2006- January 2021 for patients operated with partial nephrectomy for renal mass. History, comorbidities and laboratory results, operational information, tumor morphologies in radiographic images and its specified scores (R.E.N.A.L. score, PADUA score, C-index), peroperative and postoperative complications and pathology results of 148 regularly followed-up patients were analyzed.

Results: Mean age of the patients was 55.04±10.91 years, ratio of male to female was 1.27 and mean tumor size was 3.56 cm. Mean follow-up period was 55.53±42.26 months. Postoperative creatinine value in the 6th month showed an increase of 0.18 mg/dl compared to preoperative value. Estimated glomerular filtration rate (eGFR) also decreased by an average of 18.3%. Operation of grade 4 tumors significantly affected the postoperative renal function. PADUA score (p=0.023) had a significant effect on postoperative GFRs and duration of ischemia. Also, difference in pre-and postoperative GFRs and its percentage change were significantly affected by C-index (p=0.035, p=0.042). Pathological size (p=0.038), R.E.N.A.L. score (p=0.001), PADUA score (p<0.001), duration of ischemia (p=0.045) had a positively and C-index (p=0.001) had a negatively significant correlation with Modified Clavien-Dindo Complication Scoring System.

Conclusion: All nephrometry scores, duration of ischemia and tumor size were associated with the complication rates according to Clavien classification. Tumor grade, PADUA score and C-index are valuable parameters for predicting renal dysfunction after partial nephrectomy.