Differential Diagnosis of Pigmented Lesions in the Oral Mucosa: A Clinical Based Overview and Narrative Review Differential Diagnosis of Pigmented Lesions in the Oral Mucosa: A Clinical Based Overview and Narrative Review Labial or Oral Melanotic Macule Benign, asymptomatic, and often underdiagnosed. Swipe to learn how to recognize, diagnose, and manage this simple yet important lesion! #thebasicdentist #rguhs #kuhs #tnmgrmu #OralPathology #MelanoticMacule #DentalFacts Oral Mucosal Melanosis IntechOpen Labial melanotic macule 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