Primary Oral Malignant Melanoma 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 Melanocytic nevi and melanomas of the oral mucosa: detailed description of a case series Anais Brasileiros de Dermatologia (Portuguese) PDF] Pigmented lesions of the oral mucosa and perioral tissues: a flow chart for the diagnosis and some recommendations for the management. Semantic Scholar