Ulcerative lichen planus of the foot.

Ulcerative lichen planus of the feet is a rare variant of lichen planus. We report a case presenting with chronic painful ulceration of the feet and cicatricial changes of the toenails. The pathology of the ulceration showed diagnostic of lichen planus. She also had typical lichen planus on the dorsal hands. The ulceration was resistant to many kinds of topical agents, but completely healed within 2 months of dapsone treatment. The clinical manifestations and treatment responses of this disease in the English literature are also reviewed.(Dermatol Sinica 22 : 306-311, 2004)