Patient demographics and tumor characteristics
| Characteristics | ||
| Age (years) | ||
| Median (range) | 69 (24–82) | |
| Sex, n (%) | ||
| Male | 12 (57.1) | |
| Female | 9 (42.9) | |
| Primary tumor thickness (mm) | ||
| n (range) | 13 (0.4–16) | |
| 0–1.00, n (%) | 4 (19) | |
| 1.00–4.00, n (%) | 6 (28.6) | |
| >4.00, n (%) | 3 (14.3) | |
| Missing, n (%) | 8 (38.1) | |
| Primary tumor ulceration status, n (%) | ||
| Absent | 9 (42.9) | |
| Present | 4 (19) | |
| Missing | 8 (38.1) | |
| Primary tumor anatomical site, n (%) | ||
| Arms/legs | 5 (23.8) | |
| Torso | 5 (23.8) | |
| Head/neck | 7 (33.3) | |
| Missing | 4 (19) | |
| Primary tumor mitosis, n (%) | ||
| Absent | 5 (23.8) | |
| Present | 7 (33.3) | |
| Missing | 9 (42.9) | |
| AJCC Cancer Staging Manual stage at pathological diagnosis, n (%) | ||
| Stage I | 8 (38.1) | |
| Stage II | 4 (19) | |
| Stage III/IV | 5 (23.8) | |
| Missing | 4 (19) | |
AJCC, American Joint Committee on Cancer.