Figure 2

Kaplan–Meier survival estimates for 321 patients with metastatic melanoma according to combination factors: (A) prognostic model with low, intermediate and high risk. (B) AJCC stage IV classification: M1a, normal lactate dehydrogenase (LDH) and metastases confined to the skin and lymph nodes, M1b including lung metastases and normal LDH and M1c including other visceral organs or elevated serum LDH.