A case of oral mucosa pigmentation diagnosed as an amalgam tattoo

Yoshitaka Takanashi, Hiroshi Hidaka, Toshimitsu Kobayashi

Research output: Contribution to journalArticlepeer-review


A 59-year-old woman presented with an asymptomatic pigmented lesion on the lower right gingival mucosa. She had received dental treatment two years previously. The pathological findings of the lesion showed irregular black fragments in mucosa. Immunohistochemical analysis of the specimen failed to demonstrate positive staining for melanin and ruled out other pigmented lesions such as malignant melanoma or melanocytic nevus. The diagnosis was consistent with an amalgam tattoo.

Original languageEnglish
Pages (from-to)1065-1067
Number of pages3
JournalPractica Oto-Rhino-Laryngologica
Issue number11
Publication statusPublished - 2012 Nov


  • Amalgam tattoo
  • Immunohistochemical analysis
  • Oral mucosa

ASJC Scopus subject areas

  • Otorhinolaryngology


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