Case Challenge 009: A Rapidly Enlarging Pigmented Lesion of the Buccal Mucosa Melaninassociated pigmented lesions of the oral mucosa: presentation, differential diagnosis, and treatment Mller 2010 Dermatologic Therapy Wiley Online Library 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 Relative frequency of solitary melanocytic lesions of the oral mucosa Buchner 2004 Journal of Oral Pathology & Medicine Wiley Online Library COM August 2004 Diagnosis UW School of Dentistry Pigmented (Purple or Brown) Lesions in the Mouth Pigmented (Purple or Brown) Lesions in the Mouth Kazemi Oral Surgery Facialart.com