Fig. 4

Kaplan-Meier curves of CSS were delineated based on the identified independent prognostic factors, including age, sex, histology, thickness, ulceration, stage, metastases, and surgery (a-d, i-l) for HNM training cohort, e-h, m-p for BM training cohort. CSS = cancer-specific survival; HNM = head and neck melanoma; BM = body melanoma