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Blue Naevus

Blue Nevi are also known as blue moles & are blue-black moles that are common to people of Asian descent. A blue nevus is an acquired, benign, firm, dark-blue to gray-to-black, sharply defined papule or nodule representing a localized proliferation of melanin-producing dermal melunocylcs.

reason of Blue naevus

Probably represents accumulations of melanin­producing melanocytes in the dermis during their migration from neural crest to sites in the skin.

Signs & symptoms of Blue naevus

Blue nevi may be found anywhere on the body. They usually appears on the skin of older children & teenagers, but may develop at any age. They are harmless.

The blue naevus is a dark blue color because the color or pigment is deeper in the skin than in commoner brown moles & freckles. Characteristically, the view seen with dermoscopy is a uniform steel-blue pattern.

Diagnosis

Usually made on clinical findings, at times confirmed by excision & dermatopathologic examination to rule out nodular melanoma.

Treatment of Blue naevus

Blue nevi smaller than to mm in diameter & stable for many years usually do not need excision. Sudden appearance or change of an apparent blue nevus warrants surgical excision & dermatopathologic examination. Cellular blue nevi (1 to 3 cm) are usually excised to rule out melanoma.

prohibition of Blue naevus

There is no known way to prevent blue naevus