Plasma cell cheilitis treated with intralesional injection of corticosteroids.

Plasma cell cheilitis is an idiopathic, benign, inflammatory condition characterized by a dense band-like infiltrate of plasma cells in the oral mucosa. In addition to the lips, the disease can affect the penis, vulva, buccal mucosa, palate, gingiva, tongue, epiglottis, and larynx. Some authors have shown the effectiveness of topical or intralesional corticosteroids; however, there have been many reports describing poor therapeutic responses to topical steroids. We describe three patients with plasma cell cheilitis whose clinical condition responded rapidly to the intralesional injection of corticosteroids.