<unk> , or more formally azure lunula, are characterized by a<unk>  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<unk>  color involves the lunula (most intense pigmentation) and fades proximally. In argyria, the<unk> is permanently pigmented a slate-blue color and is most evident in the lunula. Minocycline can also turn the<unk> plate<unk> -gray.
Blue nails
Green nails
Macrodontia 
Dysplastic nail
Macrotia
Spotted lunulae
Hairy palms and soles
Polydactyly