Carbon stain

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Carbon stain
A carbon stain made from a puncture wound by a pencil (highlighted in circle).
SpecialtyDermatology

Carbon stains is a skin condition characterized by a discoloration of the skin from embedded carbon, usually occurring due to accidents with firearms or firecrackers, or from a puncture wound by a pencil. It may leave a permanent black mark of embedded graphite, easily mistaken for metastatic melanoma.[1]: 47 

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