A case of verrucous psoriasis.

Psoriasis is a common inflammatory disease with a range of clinical presentations and a chronic relapsing course. There have been few reports of verrucous psoriasis, which is distinguished by its warty appearance and characteristic histology. We report a case of this rare form of psoriasis in an elderly woman with a history of plaque-type psoriasis and and discuss the histopathologic findings.