Diffuse pigmentation of the oral mucosa Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontics 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 Skin Path Histology Slides Pigmented Flashcards Quizlet Can a black pigmented lesion of the oral cavity predict future development of melanoma Report of a case and review of literat