Material and Method
Data of 4823 patients who underwent radical or partial nephrectomy for renal tumors during the period from 2000 to 2019 was obtained from Turkish Urooncology Association-Urologic Cancer Database-Kidney (TUOA UroCaD-K) by using Research Electronic Data Capture (REDCap) (7,8) in Turkey. Of 4823 patients, 3309 RCC patients were found to have complete radiological and histopathological data and were included to this study. Exclusion criteria were incomplete radiological and/or histopathological data, other malignant or benign renal tumors except RCC, incomplete demographic data, patients less than 18 years of age and patients who were performed other procedures without surgical resection such as radiofrequency ablation and microwave ablation. Radiological and pathological stages of the patients were recorded according to TNM 2017 classification system. Radiological evaluations were made with CT and/or MRI.