Abstract:
The prevalence of psoriatic arthritis ( PsA ) in the general population is estimated at 0.3-1%, and psoriasis (PS) in the world is 2-3%, and the incidence of arthritis in patients with PS ranges from 5 to 42% [1]. According to modern researchers, the frequency of detection PsA at sick PS is 16-48% [2,3]. By data different authors incidence PsA is 3.6-6.0 on the 100000 population, a range prevalence ranges from 0.01 to 1.5% [3]. Despite the study of the prevalence, pathogenesis, clinic, diagnosis and therapy of PsA, there are still many poorly studied and debatable questions which require further research on this disease
