In the process of removing a Labial Melanotic Macule. A Labial Melanotic Macule is a well defined, oval, brown to black, flat patch on the central third of the lower lip, as seen Simple cryosurgical treatment of the oral melanotic macule ScienceDirect lip cancer Keyword Search Science Photo Library A Fast Growing Black Patch on the Upper Front Gum: Malignant Melanoma Springer Nature Link