Table 1. Baseline Cohort Characteristics of 459 Patients and 680 Tumors.

Characteristic	No. (%)
Male sex	312 (68.0)
Median age (range), y	72 (35-94)
Median follow-up time (range), mo	44 (3-135)
White race	451 (98.3)
Immunosuppressed	79 (17.0)
Tumor differentiation
Well	403 (59.2)
Moderate	147 (21.6)
Poor	130 (19.1)
Median clinical tumor diameter (range), cm	0.8 (0.2-11.0)
<2	584 (85.9)
≥2 to 4	72 (10.6)
≥4	10 (1.5)
Unknown	14 (2.1)
Perineural invasion, mm
None	632 (92.9)
<0.1	19 (3.0)
≥0.1	24 (3.5)
Present, nerve diameter unknown	5 (0.7)
Median tumor depth (range), mm	4 (1-60)
>2	397 (58.3)
>6	89 (13.1)
Unknown	150 (22.0)
Tissue level tumor depth
Dermis	582 (85.6)
Subcutaneous fat	65 (9.5)
Fascia	1 (0.1)
Muscle	23 (3.0)
Soft tissue beyond muscle	2 (0.3)
Cartilage	2 (0.3)
Bone	5 (0.7)