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 Spindle cell melanocytic lesionspart I: an approach to compound naevoidal pattern lesions with spindle cell morphology and Spitzoid pattern lesions Journal of Clinical Pathology Masson Fontana stained section of nevus cells. The delineation from the Download Scientific Diagram Riehl's Melanosis: A Multimodality, In Vivo, Real Time Skin Imaging Study with Cellular Resolution Optical Coherence Tomography and Advanced Skin Diagnosis System in a Tertiary Medical Center Labial melanotic macule (brown spot on lip) (Stony Brook Case 1) dermatology dermatopathology YouTube