Mucosal melanocytic macules 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 Mucosal Melanosis IntechOpen Oral melanotic macule Stock Image C067 2477 Science Photo Library Oral Malignant Melanoma Oral Cancer Foundation Information and Resources about Oral Head and Neck Cancer