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. Primary malignant melanoma of the tongue CJS Relative frequency of solitary melanocytic lesions of the oral mucosa Buchner 2004 Journal of Oral Pathology & Medicine Wiley Online Library Oral melanotic macule in a leukoderma patient: a comprehensive case report Mcula melantica oral en un paciente con leucoderm