Oral melanoma and other pigmentations: when to biopsy? Lambertini 2018 Journal of the European Academy of Dermatology and Venereology Wiley Online Library 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. a Multifocal brown macules on the hard palate showing variation in Download Scientific Diagram