A Rare Case: Mucous Membrane Plasmacytosis in the Larynx

Mucous membrane plasmacytosis is a rare reactive process characterized by plasma cell infiltration of mucous membranes for unknown reasons. It may be confused with malignancy because of its exophytic structure and pavement appereances. A laryngeal polypoid lesion was sent to the pathology department, clinically called fibroma, and presented to emphasize the diagnostic and differential diagnostic criteria.