In patients with pT4 RCC, who underwent RN, we found that abnormal preoperative LDH and ALP, metastases at diagnosis, pN1, and sarcomatoid dedifferentiation were independent predictors of survival.
Accurate preoperative identification of patients with pT4 disease remains difficult. In our study, only 68.9% were predicted to have clinical T4 on preoperative imaging.
Although patients with pT4M1 disease had a median CSS of 8 months, those with pT4M0 had median CSS of 37 months, indicating a benefit to surgical resection in patients with nonmetastatic disease.