Erythema elevatum diutinum: case report showing an unusual distribution.

A case of erythema elevatum diutinum showing an unusual distribution is reported. Hard nodules were located on the patient's fingertips and pulps while the extensor surfaces were not involved. The disease was initially misinterpreted based on both clinical and histologic examination. Dapsone therapy was followed by a remarkable recovery. The clinical and histologic features of erythema elevatum diutinum are summarized.