Table 1.
Patient and tumor characteristics stratified by sentinel lymph node biopsy outcome.
| Characteristic | Total samples (N=50) |
Merlin tested (N=34) |
|---|---|---|
| Male gender, n (%) | 30/50 (60%) | 19/34 (55.9%) |
| Age at SLN (years), Mean (SD) | 56.59 (18.48) | 56.76 (17.11) |
| Biopsy location, n (%) | ||
| Head and neck | 8/50 (16%) | 5/34 (14.7%) |
| Trunk | 22/50 (44%) | 13/34 (38.2%) |
| Upper extremity | 13/40 (26%) | 11/34 (32.4%) |
| Lower extremity | 5/50 (10%) | 3/34 (8.8%) |
| Acral | 2/626 (4%) | 2/34 (5.9%) |
| Breslow thickness (mm), n (%) | ||
| 0.5 – 1 (T1) | 25/50 (50%) | 13/34 (38.2%) |
| 1.1 – 2 (T2) | 14/50 (28%) | 13/34 (38.2%) |
| 2.1 – 4 (T3) | 11/50 (22%) | 8/34 (23.5%) |
| Mitotic rate type, n (%) | ||
| Absent | 13/50 (26%) | 8/34 (23.5%) |
| 1 – 6 | 32/50 (64%) | 23/34 (67.7%) |
| > 6 | 5/50 (10%) | 3/34 (8.8%) |
| Ulceration, n (%) | 12/50 (12%) | 8/34 (8.8%) |
| Histologic type, n (%) | ||
| Superficial spreading | 31/50 (62%) | 18/34 (52.9%) |
| Nodular | 10/50 (20%) | 9/34 (26.5%) |
| Desmoplastic | 2/50 (4%) | 1/34 (2.9%) |
| Acral lentiginous | 1/50 (2%) | 1/34 (2.9%) |
| Spitzoid | 2/50 (4%) | 2/34 (5.9%) |
| Nevoid | 1/50 (2%) | 1/34 (2.9%) |
| Unclassifiable | 3/50 (6.0%) | 2/34 (5.9%) |