Terzioglu, EKokuludag, ASin, AKirmaz, CYalcin, MSebik, FKabakci, T2019-10-272019-10-2719971018-9068https://hdl.handle.net/11454/34849deficiency is described. There have been several reports in the literature indicating coexistence of AS with selective IgA deficiency. As it is suggested in the literature, we believe that selective IgA deficiency is a poor prognostic factor in AS.eninfo:eu-repo/semantics/closedAccessankylosing spondylitisIgA deficiencyprognostic factorArticle76619620WOS:0000717364000109491204Q3N/A