Prognostic Outcomes and Risk Factors for Patients with Renal Cell Carcinoma and Venous Tumor Thrombus after Radical Nephrectomy and Thrombectomy: The Prognostic Significance of Venous Tumor Thrombus Level

Table 2

Pathological features of patients.

	RV	IVC level I	IVC level II	IVC level III
Tumor size (cm)					0.499
Average	8.9 ± 2.8	8.5 ± 2.8	9.1 ± 2.9	9.6 ± 3.2
Perinephric fat invasion					0.096
Yes	54	21	10	1
No	39	28	11	5
Adrenal gland invasion					0.161
Yes	8	0	2	0
No	85	49	19	6
Number of N classifications					0.849
0	82	42	17	5
1	11	7	4	1
Number of M classifications					0.132
0	69	42	16	6
1	24	7	5	0
Histological subtype					0.446
Clear cell	87	41	16	6
Papillary	4	3	3	0
Chromophobe	1	2	1	0
Collecting duct	0	2	1	0
Unclassified	1	1	0	0
Sarcomatoid					0.942
Yes	23	12	6	1
No	70	37	15	5
Fuhrman grade					0.613
G2	36	15	6	3
G3	53	31	12	3
G4	4	3	3	0