Table 1.
Baseline characteristics of recurrent melanoma patients (n = 249)
| Variable | Recurrent tissue not available (n = 135) | Recurrent tissue available (n = 114) |
|---|---|---|
| Age at primary diagnosis (years) | ||
| Median (range) | 62 (19–91) | 57 (15–92) |
| <60 | 60 (44%) | 61 (54%) |
| ≥60 | 75 (56%) | 53 (46%) |
| Gender | ||
| Male | 80 (59%) | 63 (55%) |
| Female | 55 (41%) | 51 (45%) |
| Primary tumor thickness (mm) | ||
| ≤1.0 | 22 (16%) | 11 (10%) |
| 1.01–4.0 | 65 (48%) | 65 (57%) |
| >4.0 | 29 (21%) | 17 (15%) |
| Unclassified | 3 (2%) | 0 (0%) |
| Unknown primary | 16 (12%) | 21 (18%) |
| Primary tumor ulceration status | ||
| Absent | 64 (47%) | 60 (53%) |
| Present | 53 (39%) | 32 (28%) |
| Unclassified | 2 (1%) | 1 (1%) |
| Unknown primary | 16 (12%) | 21 (18%) |
| Primary tumor mitotic rate (mitoses/mm2) | ||
| 0 | 11 (8%) | 13 (11%) |
| ≥1 | 98 (73%) | 74 (65%) |
| Unclassified | 10 (7%) | 6 (5%) |
| Unknown primary | 16 (12%) | 21 (18%) |
| Primary tumor histological type | ||
| Superficial spreading melanoma | 38 (28%) | 26 (23%) |
| Nodular melanoma | 55 (41%) | 46 (40%) |
| Acral lentiginous melanoma | 4 (3%) | 6 (5%) |
| Lentigo maligna melanoma | 2 (1%) | 2 (2%) |
| Desmoplastic melanoma | 4 (3%) | 5 (4%) |
| Other | 2 (1%) | 4 (4%) |
| Unclassified | 14 (10%) | 4 (4%) |
| Unknown primary | 16 (12%) | 21 (18%) |
| Primary tumor anatomic site | ||
| Extremity | 48 (36%) | 36 (32%) |
| Axial | 71 (53%) | 57 (50%) |
| Unknown primary | 16 (12%) | 21 (18%) |
Percentages may not sum to 100 due to rounding numbers.