Plasmoacanthoma

Plasmoacanthoma is an extremely rare verrucous tumor located on periorificial regions characterized by dense dermal plasmacytic infiltrates. some authors classify it as a form of reactive plasma cell proliferation which represents a heterogeneous spectrum of mucocutaneous disorders. these plasma cell proliferations have been considered to be a benign immunologic inflammatory reaction to known or unknown stimuli. however,the etiology of plasmoacanthoma remains highly speculative. we report the case of a 40-year-old woman who presented with a lobulated warty lesion affecting the lower lip. biopsy from the lesion was compatible with plasmoacanthoma,which remains an underreported disease in the dermatology literature. © 2016 by anais brasileiros de dermatologia.