Pigmented Oral Lesions: Clues to Identifying the Potentially Malignant Consultant360 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. Oral melanotic macule in a leukoderma patient: a comprehensive case report Mcula melantica oral en un paciente con leucoderm Oral Mucosal Melanosis IntechOpen What Caused These Multiple Hyperpigmented Macules of the Mouth? Oral Mucosal Melanosis IntechOpen