The nails in psoriatic arthritis.

Nail involvement is often present in patients suffering from psoriatic arthritis. Up to the present, no data concerning the rate of onychopathy associated with psoriatic arthropathy have been reported. 52 patients with psoriatic arthropathy have been studied with particular attention to the possible presence of and the typical features of onychopathy. Nail changes were noted in 86.5% of patients affected by arthropathic psoriasis. The commonest toenail alteration was subungual hyperkeratosis, while the most frequent fingernail change was pitting.