Survival Rates of Patients with Malignant Cutaneous Melanoma According to Initial Pathology Staging
| Stage | 2-y survival (%) | 5-y survival (%) | P for stages II–IV vs. stage I |
|---|---|---|---|
| I | 99 | 92 | |
| II | 88 | 67 | <0.0001 |
| III | 71 | 46 | <0.0001 |
| IV | 11 | 0 | <0.0001 |
Stage I = T1a N0 M0 through T2a N0 M0; stage II = T2b N0 M0 through T4b N0 M0; stage III = T1–4a N1a M0 through any T N3 M0; stage IV = any T any N M1.