Fig. 1

The flowchart for the selection procedure of patients with PRNET. OS, overall survival; PRNET, primary renal neuroendocrine tumor; NEC, neuroendocrine carcinoma; SEER, Surveillance, Epidemiology, and End Results.
The flowchart for the selection procedure of patients with PRNET. OS, overall survival; PRNET, primary renal neuroendocrine tumor; NEC, neuroendocrine carcinoma; SEER, Surveillance, Epidemiology, and End Results.