Plasma cell granuloma of the larynx is a rare benign lesion of unknown etiology, with only 21 cases reported previously. We report an additional case of plasma cell granuloma in which a 26-year-old man experienced a 1.5 x 3.4-cm, completely obstructing subglottic lesion. Because of the patient's young age, history of hemoptysis, bleeding from his tracheostomy, and the rarity of plasma cell granulomas, the patient was assumed to have hemangioma until proven otherwise. He presented with a partially obstructing glottic lesion 4 months later. Both the subglottic and glottic lesions were excised endoscopically. Multiple modalities have been used to treat plasma cell granulomas, including radiation, endoscopic CO2 laser ablation, high-dose prednisone, and open excision. In our case, steroids were given in the interim between the 2 excisions. This is the first report of a patient with two laryngeal plasma cell granulomas and the 22nd reported case of laryngeal plasma cell granuloma.
Inflammatory pseudotumors are a group of benign pseudoneoplastic lesions that possess a variety of histopathologic features, ranging from plasma cell proliferation to abundance of myofibroblasts.1 Pseudotumors containing predominantly mature plasma cells are known as plasma cell granulomas.2