Oral melanoacanthoma 2019-03-08T11:04:08Z Oral melanoacanthoma is a relatively uncommon melanocytic lesion that may cause rapid, diffuse, and dark pigmentation of a large mucosal area. However, this is an innocuous pathology that is often self-limiting and may spontaneously resolve, with or without surgical intervention. Oral melanoacanthoma usually presents as an asymptomatic, ill-defined, rapidly enlarging, macular pigmentation. Although most lesions are heavily pigmented, the coloration may or may not be uniform. Any mucosal site may be affected, but buccal mucosal involvement is most common. Although typically solitary, rare patients may present with multifocal lesions. Abnormal pigmentation of the oral mucosa