Purpose: We examined retrospectively whether outcomes of radical nephrectomy (RN) and partial nephrectomy (PN) are predictable on the basis of preoperative estimated glomerular filtration rate (eGFR) classifications. Material and methods: The study included 284 patients with renal tumor who underwent RN (n=195) or PN (n=89) at our institution. Preoperative eGFRs were categorized to reflect the stages of chronic kidney disease (CKD). The primary endpoint was postoperative onset of CKD stage 3b (eGFR
