Tags: Disease.

Blue nails or more formally azure lunula are characterized by a blue discoloration of the lunulae seen in argyria and cases of hepatolenticular degeneration (Wilson’s disease) also having been reported in hemoglobin M disease and hereditary acrolabial telangiectases.In Wilson’s disease the blue color involves the lunula (most intense pigmentation) and fades proximally. In argyria the nail is permanently pigmented a slate-blue color and is most evident in the lunula.

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