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Allergy, B12, Blue, Cobalt, Tattoo



  1. Sandhu, Amandeep
  2. Thyssen, Jacob P.
  3. Jacob, Sharon E.


ABSTRACT: Allergic reactions have infrequently been reported to metals found in tattoos (e.g., chromium, mercury). We report inflammation in a blue ink tattoo, associated with a positive patch test reaction to cobalt chloride, likely indicating primary sensitization to cobalt.