Table 2.

Tumor pathology and characteristics in entire cohort

Variable	No. Pts (%)
Mean ± SD cm tumor size (range)	6.4 ± 4.4 (0.2–35)
T stage:
T1a	231 (35.3)
T1b	103 (15.7)
T2	81 (12.4)
T3a	94 (14.3)
T3b	119 (18.2)
T3c	5 (0.8)
T4	22 (3.3)
AJCC stage:
1	326 (49.8)
2	75 (11.5)
3	181 (27.6)
4	73 (11.1)
Histology:
Conventional clear cell	469 (71.6)
Papillary	95 (14.5)
Chromophobe	40 (6.1)
Collecting duct Ca	5 (0.8)
Unclassified RCC	12 (1.8)
Unknown	34 (5.2)
Grade:
1	69 (10.5)
2	315 (48.1)
3	156 (23.8)
4	81 (12.4)
Unknown	34 (5.2)
Sarcomatoid features	39 (5.5)
Ca in lymph nodes	48 (7.3)
Metastases at presentation:
Present	88 (13.4)
Absent	567 (86.6)