Robotic-assisted laparoscopic partial nephrectomy: A comparison of approaches to the posterior renal mass

Table 2 Tumor characteristics

	RP (n = 54)	TP (n = 37)	P
Renal location
Left	20 (37.0%)	22 (59.5%)	0.043
Right	34 (63.0%)	15 (40.5%)
Pathologic tumor size (cm), mean (SD)	3.1 (1.6) n = 53	2.9 (1.2) n = 36	0.541
Surgical margin
Negative	50 (98.0%)	32 (91.4%)	0.302
Positive	1 (2.0%)	3 (8.6%)
RENAL score, mean (SD)	6.5 (1.9)	6.6 (1.8)	0.711
Radius
1	42 (77.8%)	33 (89.2%)	0.412
2	10 (18.5%)	4 (10.8%)
3	2 (3.7%)	0
Exophytic
1	29 (53.7%)	15 (40.5%)	0.412
2	20 (37.0%)	19 (51.4%)
3	5 (9.3%)	3 (8.1%)
Nearness
1	23 (42.6%)	15 (40.5%)	0.943
2	8 (14.8%)	5 (13.5%)
3	23 (42.6%)	17 (46.0%)
Location relative to polar line
1	30 (55.6%)	19 (51.4%)	0.513
2	12 (22.2%)	6 (16.2%)
3	12 (22.2%)	12 (32.4%)

P = Significance based on:

¹Independent samples t-test;

²Fisher exact test;

³Pearson χ² test. RP: Retroperitoneal; TP: Transperitoneal; SD: Standard deviation; RENAL: Radius of the tumor, exophytic/endophytic properties of the tumor, nearness of tumor to the collecting system, anterior/posterior position, location relative to the polar line.