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Melanomas: risk groups.
| (1) Low risk melanomas | |
| Stage I | |
| (2) Intermediate risk melanomas | |
| Stage II A | |
| (Breslow of 1.1–2 mm ulcerated) | |
| (Breslow of 2.1–4 mm nonulcerated) | |
| (3) High risk melanomas | |
| Stage IIB | |
| (Breslow of 2.1–4 mm ulcerated) | |
| (Breslow > 4 mm nonulcerated) | |
| Stage IIC | |
| (Breslow > 4 mm ulcerated) | |
| Stage III |
