Can a black pigmented lesion of the oral cavity predict future development of melanoma Report of a case and review of literat Skin Path Histology Slides Pigmented Flashcards Quizlet Pigmented Lesions of the Oral Mucosa: Clinical Presentation, Histology, and Recommendations for Management ORAL MELANOTIC MACULE (OMM) (Also called focal melanosis labial melanotic macule) A benign, localized, flat pigmented lesion of the oral mucosa Caused by a focal increase in melanin production