González VMC, Val-Bernal JF, González-López MA, Armesto S, Martino M, Fernández-Llaca JH

Language: Spanish
References: 9
Page: 63-66
PDF size: 334.98 Kb.

ABSTRACT

Blue nevi are typically heavily melanin-pigmented macules or papules. Amelanotic or hypopigmented blue nevus is a rare variant of blue nevus that has morphologic features similar to ordinary blue nevus but is either amelanotic or minimally pigmented. The lesions are located throughout the body with predilection for the face, the back and the dorso of the hands and feet. Both sexes are affected with a female to male rate of aproximately 2:1 and there is a predilection for young patients. Histologically is characterized by a dermal proliferation of spindle-shaped cells with little or no obvious melanin.
We here report two cases of amelanotic (hypomelanotic) blue nevus. Recognition of amelanotic blue nevus is important because of the lack of pigmentation may result in clinical and pathologic diagnostic difficulty. The histological differential diagnosis includes dermatofibroma, scar, intradermal nevus, neurofibroma and desmoplastic melanoma.

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