Table I.

Characteristics of patients with clear cell renal carcinoma based on The Cancer Genome Atlas database.

Clinical characteristics	Nο. of cases	Percentage
Topography
T1	275	51.21
T2	69	12.85
T3	182	33.89
T4	11	2.05
Lymph node
N0	240	93.39
N1	17	6.61
Metastasis
M0	426	84.36
M1	79	15.64
Stage
I	269	50.37
II	57	10.67
III	125	23.41
IV	83	15.55
Age, years
<55	173	32.52
≥55	359	67.48
Sex
Female	191	35.57
Male	346	64.43