Table 2.

Pathologic features of RCC occurring in young (≤40 years) and older adults (>40 years)

	≤40 years (n=44)	>40 years (n=794)	P value
Mean Tumor Size (cm)	5.3	5.9	NS*
T3 or T4 Tumors	18%	31%	0.08
Stage III/IV	18%	33%	0.047
Grade 3 or 4 Tumors	32%	31%	NS
Clear cell RCC	71%	79%	NS
Papillary RCC	14%	13%	NS
Chromophobe RCC	12%	6%	0.03
Collecting Duct RCC	5%	0.50%	0.03
Nodal or Distant Metastasis	5%	8.30%	NS

^*NS: no significant statistical difference.