Transformation of a benign oral pigmentation to primary oral melanoma 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 Oral melanoacanthoma and oral melanotic macule: a report of 8 cases, review of the literature, and immunohistochemical analysis Lichen Planus Pigmentosus with True Melanocytic Nests: A Case Report with a Comprehensive Literature Review Focal melanocytic lesions of the oral mucosa: An epidemiological and morphological study Santana 2023 Oral Diseases Wiley Online Library Melanocytic Lesions Basicmedical Key