Table 1. Clinical characteristics of patients and controls.

	ccRCC patients	benign tumor patients	Healthy donors
N	36	16	36
Mean age (range)	60.9(35-88)	40.7(36-57)	34.5(12-43)
Gender
Male	15(41.7%)	7(43.8%)	20(55.6%)
Female	21(58.3%)	9(56.2%)	16(44.4%)
TNM Stage
I and II	28	_	_
III and IV	8	_	_
Tumor Size (cm)		_	_
<7	23	_	_
≥7	13