title: Clinical features and outcomes of HLA-b27-positive and HLA-B27-negative acute anterior uveitis in a Turkish patient population.
abstract: OBJECTIVE
  To compare the clinical features and outcomes of HLA-B27-positive and HLA-B27-negative acute anterior uveitis (AAU) in a large Turkish patient population.
  
  
  METHODS
  Forty-four patients with HLA-B27-positive AAU and 65 with HLA-B27-negative AAU were reviewed retrospectively. HLA-B27 typing, gender, laterality, clinical features (fibrinous reaction, hypopyon formation), ocular complications, medical treatment, and final visual acuity were recorded. Statistical analyses included Student's t-test, Fisher's exact test, Yate's corrected Chi2 test, and Mann-Whitney U test. A p-value of <0.05 was considered statistically significant.
  
  
  RESULTS
  Forty percent of all patients with AAU were found to be positive for HLA-B27 antigen. HLA-B27-positive AAU was significantly more common in males and HLA-B27-negative AAU in females. Unilateral or bilateral alternating AAU as well as fibrinous reaction and hypopyon formation were more common in HLA-B27-positive patients. Posterior iris synechiae and cataract formation were more common and systemic immunosuppressive agents were exclusively required in patients with HLA-B27-negative AAU. Visual outcome did not differ significantly between the HLA-B27-positive and HLA-B27-negative groups.
  
  
  CONCLUSIONS
  HLA-B27 association is less common in Turkish patients with AAU than in other populations reported in the literature. Although distinct features of HLA-B27 uveitis were confirmed in our study, visual outcome did not differ from idiopathic AAU. Therefore, we believe that HLA-B27 typing in patients with AAU helps the clinician with the diagnosis. However, it has a limited value in determining the prognosis.
authors.affiliation: Department of Ophthalmology, Istanbul Faculty of Medicine, Istanbul University, Capa 34390-Istanbul, Turkey.
authors.forename: Samuray
authors.initials: S
authors.lastname: Tuncer
authors.forename: Yakubu Seidu
authors.initials: YS
authors.lastname: Adam
authors.forename: Meri
authors.initials: M
authors.lastname: Urgancioglu
authors.forename: Ilknur
authors.initials: I
authors.lastname: Tugal-Tutkun
mesh_terms: D000208:Acute Disease; D000328:Adult; D005260:Female; D005500:Follow-Up Studies; D015796:HLA-B27 Antigen / Q000276:immunology*; D006801:Humans; D007166:Immunosuppressive Agents / Q000627:therapeutic use; D015994:Incidence; D008297:Male; D011379:Prognosis; D012189:Retrospective Studies; D016036:Seroepidemiologic Studies; D014421:Turkey / Q000453:epidemiology; D014606:Uveitis, Anterior / Q000175:diagnosis* / Q000188:drug therapy / Q000276:immunology; D014792:Visual Acuity
chemical_list: D015796:HLA-B27 Antigen; D007166:Immunosuppressive Agents