Pigmented (Purple or Brown) Lesions in the Mouth Pigmented (Purple or Brown) Lesions in the Mouth Kazemi Oral Surgery Facialart.com Melanotic Macules, Naevi, and Melanoma Springer Nature Link 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 Malignant Melanoma Oral Cancer Foundation Information and Resources about Oral Head and Neck Cancer Diagnosis of oral pigmentations and malignant transformations ScienceDirect