Dark Patches Inside Mouth: 7 Alarming Causes Liv Hospital PDF] Oral melanoacanthoma and oral melanotic macule: a report of 8 cases, review of the literature, and immunohistochemical analysis. Semantic Scholar 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 collection of resources for RACGP exams Next Gen GP Text Book live webinars AKT and KFP questions Labial Melanotic Macules DoveMed Oral Melanotic Macule MEDizzy