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Identifying skin neoplasms benign vs. malignancy - page 11 / 24

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Malignant Melanoma

Four types

Superficial spreading

Most common, may develop anywhere on the body but appears with increased frequency on the upper backs and legs.

Associated with preexisting dysplastic nevus.

Irregular border

Ranging from a few millimeters to several centimeters

Nodular melanoma

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

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