What is this lesion on a leg (2nd case) ?

A 71-year old woman consulted for this enlarging multi-colored lesion on her right leg.

Dermoscopy revealed:

• irregular pigmentation
• atypical pigment network
• negative pigment network
• irregularly distributed blotch
• blue-white veil

in favor of a melanoma.

An excision was performed and pathology revealed a superficial spreading melanoma in vertical extension, Clark level IV, and Breslow index at 3,1 mm.