Table 1.

Patient, disease and treatment characteristics

SLNB	Group 1 (n = 12)	Group 2A&B (n = 14)	Group 2C (n = 4)	p value
Age (years)				0.793
Median (range)	50 (28–79)	52.5 (27–82)	55 (51–67)
Primary vulvar tumor location				0.553
Midline	9 (75%)	11 (78.6%)	4 (100%)
Lateralized	3 (25%)	3 (21.4%)	0
Diameter (mm)				0.7645
Median (range)	15.5 (6.0–54.0)	19.5 (9.0–60.0)	22.5 (16.0–35.0)
Diameter categories				0.246
< 20 mm	7 (58.3%)	7 (50%)	1 (25%)
≥ 20 mm but < 40 mm	3 (25%)	5 (35.7%)	3 (75%)
≥ 40 mm	2 (16.7%)	2 (14.3%)	0
Depth (mm)				0.0038*
Median (range)	3.0 (1.8–6.0)	6.0 (2.0–15.0)	8.5 (5.0–23.0)
Grade				0.410
1	–	–	–
2	10 (83.3%)	11 (78.6%)	2 (50%)
3	2 (16.7%)	3 (21.4%)	2 (50%)
Radiotherapy	4 (33.3%)	6 (42.9%)	3 (75%)
Chemotherapy	0	2 (14.3)	2 (50%)
Local recurrence	1 (8.3%)	1 (7.1%)	1 (25%)
Groin recurrence	1 (8.3%)	0	0
	(fat tissue)
Distant metastases	1 (8.3%)	0	1 (25%)

A p value of less than 0.05 is considered to be statistical significant

*At depth of infiltrating tumor