D. Depth of melanoma – Explanation
Melanoma: the invasion depth of the tumour is the single most important prognostic factor
Malignant melanoma: prognostic factors
The invasion depth of a tumour (Breslow depth) is the single most important factor in determining
prognosis of patients with malignant melanoma
| Breslow Thickness | Approximate 5 year survival |
| < 1 mm | 95-100% |
| 1 – 2 mm | 80-96% |
| 2.1 – 4 mm | 60-75% |
| > 4 mm | 50% |
