Despite the fact that skin disorders lead to chronicity, usually, people consider them less important than other diseases, as they are not life-threating. Evidence of the peculiarities of seronegative spondyloarthropathies (SpA) and psoriasis (including psoriatic arthritis) has increased worldwide, as indicated by the large number of recent publications on this topic 1 .SpA is a heterogeneous group of chronic inflammatory rheumatic diseases present as inflammatory back pain, asymmetric peripheral arthritis, enthesitis, dactylitis, and tenosynovitis. SpA can even cause structural complications to spine and sacroiliac joints. Genetic issues, microbial triggers, inflammation of bone marrow and enthesial structures are critical determinants of the disease 2,3 . Prevalence of SpA varies among populations and geographical areas. Worldwide prevalence is estimated to be from 0.5% to 1.9% 4 . According to the ESORDIG study, Greece has a lower prevalence of SpA compared to other countries (0.49%) 5 . However, up-to-date data are lacking, yet needed in public policy planning.Psoriasis is an autoimmune chronic inflammatory
CONFLICTS OF INTERESTThe authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none was reported.