Melanotic and non melanotic malignancies of the face and external ear A review of current treatment concepts and future options ScienceDirect Genetics of melanocytic nevi Roh 2015 Pigment Cell & Melanoma Research Wiley Online Library Common benign melanocytic tumours Stamford Skin Centre 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. Non Melanoma Skin Cancer