TABLE 2.
Prevalence and Tumor Characteristics in Patients With Invasive Melanomas
| Characteristic | All Patients | Patients Aged ≤10 Years |
Patients Aged >10 Years to ≤20 Years |
Patients Aged >20 Years |
|
|---|---|---|---|---|---|
| Year of diagnosis | Median (Range) |
2000 1953-2008 |
2001 1976-2007 |
2004 1953-2008 |
1999 1983-2006 |
| Sex, no. | Female | 210 (57.5%) | 9 (36.0%) | 185 (57.8%) | 16 (80.0%) |
| Male | 155 (42.5%) | 16 (64.0%) | 135 (42.2%) | 4 (20.0%) | |
| P = .04 | |||||
| Thickness | Mean (SD) | 1.63 (1.94) | 2.66 (2.06) | 1.59 (1.96) | 1.04 (0.72) |
| P = .0041 | |||||
| Clark level | I | 3 (1.0%) | 1 (6.3%) | 2 (0.7%) | 0 (0.0%) |
| II | 50 (16.2%) | 1 (6.3%) | 43 (15.6%) | 6 (35.3%) | |
| III | 79 (25.7%) | 1 (6.3%) | 77 (28.0%) | 1 (5.9%) | |
| IV | 159 (51.6%) | 8 (50.0%) | 141 (51.3%) | 10 (58.8%) | |
| V | 17 (5.5%) | 5 (31.3%) | 12 (4.4%) | 0 (0.0%) | |
| Unknown | 57 | 9 | 45 | 3 | |
| P = .0001 | |||||
| Mitosis | No | 122 (52.1%) | 6 (40.0%) | 104 (51.7%) | 12 (66.7%) |
| Yes | 112 (47.9%) | 9 (60.0%) | 97 (48.3%) | 6 (33.3%) | |
| Unknown | 131 | 10 | 119 | 2 | |
| P = NS | |||||
| Ulceration | No | 265 (87.8%) | 19 (79.2%) | 229 (88.4%) | 17 (89.5%) |
| Yes | 37 (12.3%) | 5 (20.8%) | 30 (11.6%) | 2 (10.5%) | |
| Unknown | 63 | 1 | 61 | 1 | |
| P = NS |
Abbreviations: NS, not significant; SD, standard deviation.