فهرست نشریات علمی دسترسی آزاد ایران

Oral melanoacanthoma is a benign, reactive, pigmented mucocutaneous lesion. It typically presents as a solitary macule on the buccal mucosa, followed by the palate, lips, and gingiva, with a higher prevalence in women. The diagnosis of this lesion is established through histological examination. Once diagnosed, no treatment is required. We present a case of oral melanoacanthoma located in the posterior region of the right buccal mucosa in a 34-year-old woman. The lesion appears as a pigmented macule with indistinct borders in certain areas and an uneven dark brown coloration. The observations and findings noted in this case are atypical. This case report underscores the importance of clinicians’ awareness of oral melanoacanthoma in the differential diagnosis of oral pigmented lesions. Given that malignant melanoma is included in the differential diagnosis of pigmented lesions, a biopsy of oral pigmentations—particularly those with unclear borders and non-uniform coloration—is essential.