Pigmented Lesions of the Oral Cavity Pocket Dentistry Mystery behind labial and oral melanotic macules: Clinical, dermoscopic and pathological aspects of Laugier Hunziker syndrome 05 May 03 Eng Labial melanotic macule. B). Increased numbers of me lanocytes along Download Scientific Diagram Is focal melanotic lesion potentially malignant? A case report 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