Cutaneous and Oral Melanocytic Nevi: Background, Pathophysiology, Etiology PDF] Morphologic changes of acquired melanocytic nevi with eccentric foci of hyperpigmentation ("Bolognia sign") assessed by dermoscopy. Semantic Scholar Labial melanotic macule. B). Increased numbers of me lanocytes along Download Scientific Diagram 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 Melanocytic Lesions Part 3 Ocular melanomas and melanocytic lesions of the eye ScienceDirect