Esophageal lichen planus: a rare cause of dysphagia.

Lichen planus (LP) is an idiopatic inflammatory disorder of mucocutaneous tissue, most frequently involving the skin or oral cavity, and rarely the esophagus, resulting in symptomatic dysphagia. Esophageal lichen planus most commonly presents in middle-aged women and the endoscopic finding are not specific; erosions, exudates, pseudomembranes and even stenosis can be found. Treatment generally starts with oral glucocorticoid. The risk of malignant transformation justifies endoscopic follow-up.