Epidemiology of Nail Psoriasis

Few relevant studies of the epidemiology of nail psoriasis have been published to date. A literature search collected 32 papers. The prevalence of nail psoriasis still varies from study to study, even in the same country. Some papers show a correlation with the duration of skin psoriasis, some with the severity of skin psoriasis and some an association with psoriatic arthritis. Most of the studies detail the most common clinical features of nail psoriasis. Determining the prevalence of nail psoriasis seems utopian.