A Rare Case of Oral Mucosal Pigmentation: Differential Diagnosis and Case Presentation JCDA Pigmented Oral Lesions: Clues to Identifying the Potentially Malignant Consultant360 Dermoscopy of pigmented oral lesions; A research study ScienceDirect Melanotic macule. Benign. Dark spot on labia (or lip). Analogous to lentigo simplex. Hyperpigmented basal keratinocytes & dermal melanophages. Slight in single basal melanocytes; NO nests. More info like this in melanotan II C50H69N15O9 CID 92432 PubChem Oral Malignant Melanoma Oral Cancer Foundation Information and Resources about Oral Head and Neck Cancer