Most common, may develop anywhere on the body but appears with increased frequency on the upper backs and legs.
Associated with preexisting dysplastic nevus.
Ranging from a few millimeters to several centimeters
Dark brown or reddish brown, dome-shaped, pedunculated or nodular lesion
Lentigo maligna melanoma
Horizontal or radial growth before vertical growth phase
Acral lentiginous melanoma (lease common)
Palmar and plantar , digits and the subungual areas , all ethnic groups
Appears as a dark brown to black, unevenly pigmented patch
Lesion becomes raised or develops ulceration likely invasion to deep tissues