[Etiopathogenetic aspects of psoriatic arthritis with special reference to immunologic factors].

On 21 patients with psoriasis and 22 with psoriatric arthritis examinations for the recognition of the immune regulation were performed and the results were compared with those of healthy control persons and patients with rheumatoid arthritis. The psoriatric arthritis shows humoral as well as cellular disturbances of immune regulations which in the group comparison with the psoriasis and the rheumatoid arthritis partly have communities, but partly also have differences. With regard to size and distinction of the disturbances the patients with rheumatoid arthritis have the highest degree of severity. With the help of the techniques used by us systemic cellular disturbances of the immune regulations could not be proved in the psoriasis. The psoriatic arthritis to a certain extent occupies a medium position. But a clear coordination of these disturbances into the pathogenetic process is not yet possible.