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. a Multifocal brown macules on the hard palate showing variation in Download Scientific Diagram Pigmented Lesions of the Oral Cavity Oral and Maxillofacial Surgery Clinics Dental Update Malignant oral melanoma: how to spot it and how it is managed Dental Update 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