Labial melanotic macules in atopic dermatitis. (a) Multiple macular Download Scientific Diagram Mystery behind labial and oral melanotic macules: Clinical, dermoscopic and pathological aspects of Laugier Hunziker syndrome Oral pathology: Noting a pigmented macule that often presents a diagnostic dilemma Registered Dental Hygienists Pigmented Lesions schneider Flashcards Quizlet 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