Pigmented Lesions Springer Nature Link Pigmented Lesions of the Oral Mucosa Pocket Dentistry Congenital Melanotic Macule of the Tongue: A Five Year Follow up Dermatology Practical & Conceptual 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. Labial melanotic macule Mucosal melanocytic macules