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. Pathology Outlines Melanotic macule Oral Melanotic Macule: Symptoms and Treatment Skinsight Mucosal melanocytic macules Pigmented Lesions of the Oral Cavity Oral and Maxillofacial Surgery Clinics Pigmented Lesions of the Oral Mucosa Pocket Dentistry