title: Photo quiz. Case 4. He had been a coal miner. The colour was caused by accidental tattooing from coal dust entering a cut on his finger.
authors.affiliation: Leicester Royal Infirmary.
authors.forename: Nigel
authors.initials: N
authors.lastname: Stollery
mesh_terms: D003031:Coal; D003032:Coal Mining; D004391:Dust; D005383:Finger Injuries / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010859:Pigmentation Disorders / Q000209:etiology*; D013653:Tattooing; D014950:Wounds, Penetrating / Q000150:complications*
chemical_list: D003031:Coal; D004391:Dust