MIXED LESION OF MELANOTIC MACULE AND AMALGAM TATTOO: A CASE REPORT

Oral pigmentation may be exogenous caused by deposition or introduction of some material in the oral mucosa or endogenous due to increased melanin production or the number of melanocytes. A white female patient, 33 years old, with a black stain located in the gingiva between teeth 34 and 35, approximately 5 mm in diameter, asymptomatic, with 4 months of evolution, was attended to in oral medicine. A periapical radiography was performed, which did not present alterations. The probable clinical diagnoses were an oral melanotic macule, amalgam tattoo, and oral nevi. After excisional biopsy, microscopic analysis revealed the presence of increased melanin pigmentation along the basal epithelial layer and metal fragments within the connective tissue. These characteristics confirm the rare diagnosis of mixed injury of oral melanotic macule and amalgam tattoo. After 6 months the patient did not present with a recurrence of the lesion and is in good health.