Pigmented Oral Lesions: Clues to Identifying the Potentially Malignant Consultant360 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. COM Jan. 2008 Diagnosis UW School of Dentistry Melanotan Peptide Natural Tan & Skin Protection biolabshop.co.uk Initial clinical appearance with melanotic macules located on lower Download Scientific Diagram Pigmented Lesions of the Oral Cavity Oral and Maxillofacial Surgery Clinics