“…The prognostic relevance associated with gender, anatomic site, tumour thickness, Clark’s level, histological type, ulceration, mitotic rate, and vascular invasion in primary malignant melanomas has been described many times as reviewed by Rivers and Ho [1]. These and other parameters have been used to characterize prognostic subgroups [2, 3], and have been investigated using various multivariate methods and models [4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14].…”