Superficial spreading melanoma is the most common subtype of invasive melanoma, compromising nearly 75% of all malignant melanomas. These melanomas can occur anywhere in the body and at any age, but have a predilection for the back in men and lower extremities in women. It typically presents as a variably pigmented plaque with an irregular border. The lesions can be red, brown, blue, black and white. Histologically, superficial spreading melanomas are asymmetric and poorly circumscribed.
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