Mini-Margin Nephron Sparing Surgery for Renal Cell Carcinoma 4 cm or Less

Table 1

Comparisons of the clinical and pathological features.

	mm-NSS	1 cm-NSS	RN	P Value
No. of Pts	135	98	156
Pts age at surgery (yr)
Mean	57	60	59	.018
Median (range)	56 (41~73)	59 (46~70)	59 (45~75)
No. male	106 (78.5%)	75 (76.5%)	117 (75.0%)	.779
Tumor size (cm)
Mean	3.3	2.9	3.0	.513
Median (range)	3.5 (1.0~4.0)	3.2 (1.0~4.0)	3.3 (1.5~4.0)
Fuhrman nuclear grade
G1+2	130 (96.3%)	96 (98.0%)	151 (96.8%)	.764
Histologic classification
Clear cell RCC	105 (77.8%)	78 (79.6%)	125 (80.1%)	.880
Surgical margin (mm)
Mean (median, range)	2.2 (2.0, 0~5)	11.6 (12, 10~15)	—	.000*
Complication rate	0.7% (1/135)	5.1% (5/98)	—	.049*
Followup (months)
Mean (median, range)	69 (73, 15~130)	82 (82, 60~103)	82 (78, 23~134)	.000

RCC = renal cell carcinoma, pts = patients; *compared between mm-NSS and 1 cm-NSS groups.