The oral amalgam tattoo is an easily recognizable entity that usually does not require histologic verification, if the investigator is aware of the lesion and its pathogenesis. Seventy-two cases of amalgam tattoo are reviewed.
Weathers DR, Fine RM. Amalgam Tattoo of Oral Mucosa. Arch Dermatol. 1974;110(5):727-728. doi:10.1001/archderm.1974.01630110025004