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. benign (non cancerous) melanocytic nev Stock Image Science Source Images Lentigo maligna Wikipedia Managing non melanoma skin cancer in primary care: A focus on topical treatments BPJ 57 December 2013 Nevus of Ota: What Is It and How Is It Treated?