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 Mystery behind labial and oral melanotic macules: Clinical, dermoscopic and pathological aspects of Laugier Hunziker syndrome Oral medicine: 7. red and pigmented lesions Dental Update Prolonged evolution of a lentigo maligna Journal of the American Academy of Dermatology Pictures of Melanoma: Examples, Identification, and More Benign oral mucosal lesions: Clinical and pathological findings Journal of the American Academy of Dermatology