Prevalence of 13 histological parameters in 55 invasive malignant melanomas
| Feature | Prevalence | % |
|---|---|---|
| Cytological atypia | 55 | 100 |
| Dermal lymphocytic infiltrate | 54 | 98.2 |
| Suprabasal melanocytes | 53 | 96.4 |
| Asymmetry | 52 | 94.5 |
| Irregular and confluent nests | 48 | 87.3 |
| Single melanocytes predominating | 43 | 78.2 |
| Dimension >6 mm | 37 | 67.3 |
| Poor circumscription | 35 | 63.6 |
| Asymmetrical melanin | 32 | 58.2 |
| Melanin in deep cells | 29 | 52.7 |
| Absence of maturation | 29 | 52.7 |
| Mitoses | 16 | 29.1 |
| Necrosis | 1 | 1.8 |