Macular Pigmented Oral Mucosal Lesions: An Amalgam Tattoo Case Report Dentistry Today Mystery behind labial and oral melanotic macules: Clinical, dermoscopic and pathological aspects of Laugier Hunziker syndrome Dental Update Malignant oral melanoma: how to spot it and how it is managed Dental Update Brown spots, especially on the lips, can be alarming to some. In some instances it can indicate rare oral mucosal melanoma, however in this case it was a non cancerous labial melanotic macule.