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 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 Proliferations Clinical Tree Spindle cell melanocytic lesionspart I: an approach to compound naevoidal pattern lesions with spindle cell morphology and Spitzoid pattern lesions Journal of Clinical Pathology