ORAL MELANOACANTHOMA ASSOCIATED WITH PSEUDOMELANOCYTIC NESTS: AN IMMUNOHISTOCHEMICAL STUDY

Oral melanoacanthoma is an uncommon pigmented lesion of the oral mucosa characterized by the presence of acanthosis and dendritic pigment-laden melanocytes located in the prickle cell layer of the epithelium. Pseudomelanocytic nests (PNs) represent cellular aggregates of keratinocytes, macrophages, and melanocytes, usually located in close relationship with lichenoid inflammation, which if not recognized can be misdiagnosed as melanoma. A...