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Blue Nevus


Group of melanocytic lesions which all appear blue in colour due to the optical effects of light reflecting off melanin deep in the dermis. The blue nevus, a benign, usually solitary lesion, represents a localized proliferation of dermal melanocytes. It presents as a dark blue to black, moderately firm, rounded, sharply defined nodular tumour composed of spindle-shaped melanocytes with slender cytoplasmic processes, occurring often in association with melanin-laden macrophages in a sclerotic dermis.




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