Metastatic oral malignant melanoma transformed from pre existing pigmented lesions in mandibular gingiva: Report of an unusual case ScienceDirect Oral pathology: Noting a pigmented macule that often presents a diagnostic dilemma Registered Dental Hygienists Pigmented Oral Lesions: Clues to Identifying the Potentially Malignant Consultant360 Oral Mucosal Melanosis IntechOpen This patient has multiple labial melanotic macules. These are essentially freckles of the lips. These most commonly involve the lower lip. This patient had involvement of both the upper and lower lips.