Lingual melanotic macule the first case report in an adult patient* Anais Brasileiros de Dermatologia Differential Diagnosis of Pigmented Lesions in the Oral Mucosa: A Clinical Based Overview and Narrative Review Pigmented Lesions of the Oral Mucosa: Clinical Presentation, Histology, and Recommendations for Management American Journal of Clinical Dermatology Springer Nature Link 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.