title: [Practical significance of HL-A groups in rheumatology].
abstract: Since 1972, several relations have been demonstrated between some HL-A antigens and some articular diseases. The W27 antigen frequency is highly increased in ankylosing spondylitis (88%) and in Reiter disease (78%) compared with controls (5%). In peripheral forms of psoriatic rheumatism, the W17 and HL-A13 antigens are more fréquent (24% and 15%) than in healthy subjects (4% and 5%). In central forms of psoriatic rheumatism, there is a relation with W27 (48%) and still, we do not know if this association concerns only spondylitis or also sacro-ileitis. The HL-A typing may be useful for the diagnosis of some rheumatic diseases, when they present atypical appearances. W27 possesses a considerable value for the diagnosis of ankylosing spondylitis. The relation between W27 and ankylosing spondylitis is clearly stronger than that between Waaler-Rose reaction and rheumatoid arthritis.
mesh_terms: D016918:Arthritis, Reactive / Q000276:immunology; D001172:Arthritis, Rheumatoid / Q000276:immunology; D006073:Gout / Q000276:immunology; D006680:HLA Antigens / Q000032:analysis*; D006649:Histocompatibility Antigens / Q000032:analysis*; D006801:Humans; D011565:Psoriasis / Q000276:immunology; D012216:Rheumatic Diseases / Q000276:immunology*; D013167:Spondylitis, Ankylosing / Q000276:immunology
chemical_list: D006680:HLA Antigens; D006649:Histocompatibility Antigens
vernacular_title: Intérêt pratique des groupes HL-A en rhumatologie