Oral Mucosal Melanosis IntechOpen Pigmented Macula on the Gingival Papillain a Young Male: Diagnosis and Management: A Case Report A Blackish Gingiva Revealing a Metastatic Melanoma of the Oral Mucosa Pigmentary Disorders Springer Nature Link Diagnosis of oral pigmentations and malignant transformations ScienceDirect ORAL MELANOTIC MACULE (OMM) (Also called focal melanosis labial melanotic macule) A benign, localized, flat pigmented lesion of the oral mucosa Caused by a focal increase in melanin production