Lingual melanotic macule the first case report in an adult patient* Anais Brasileiros de Dermatologia Oral Mucosal Melanosis IntechOpen 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 Malignant Melanoma Oral Cancer Foundation Information and Resources about Oral Head and Neck Cancer