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Superficial spreading melanoma
Superficial spreading melanoma
Superficial spreading melanoma is the most common variant and shows an equal sex incidence.122 The sites most frequently affected are the leg (especially in females) and the back (particularly in males). The lesion initially presents as a flat scaly macule or plaque, which after a variable period of time develops a blue or blue-black nodule of invasive melanoma (Fig. 26.6). Hypopigmented or amelanotic variants are erythematous or flesh colored. The initial plaque is irregular, often 1โ2โฏcm in diameter, and shows much greater variation in color than a banal or dysplastic nevus. Scalloping of the
Fig. 26.6 Superficial spreading melanoma: there is a large nodule of invasive melanoma with a surrounding macular component. From the collection of the late N.P. Smith MD, the Institute of Dermatology, London, UK.