title: Hidden psoriatic arthritis in seronegative oligoarthritis: a 14-year follow-up study.
abstract: Out of a cohort of 64 patients with seronegative oligoarthritis (SO), 8 patients with HLA-B13, 5 with Bw16 and 3 with HLA-B17 were invited to participate in a 14-year check-up. Thirteen patients showed some features of psoriatic arthritis, including 5 with suspected skin or nail disease, 5 with a family history of psoriasis, 3 with DIP joint affliction, and 2 with aortic valve insufficiency. It is concluded that a quarter of the patients with SO may have hidden psoriatic arthritis.
authors.affiliation: Rheumatism Foundation Hospital, Heinola, Finland.
authors.forename: K
authors.initials: K
authors.lastname: Kaarela
authors.forename: J
authors.initials: J
authors.lastname: Mattila
authors.forename: K
authors.initials: K
authors.lastname: Lehtinen
authors.forename: A
authors.initials: A
authors.lastname: Kotaniemi
authors.forename: R
authors.initials: R
authors.lastname: Luukkainen
mesh_terms: D000293:Adolescent; D000328:Adult; D001168:Arthritis / Q000276:immunology*; D015535:Arthritis, Psoriatic / Q000276:immunology*; D003937:Diagnosis, Differential; D005260:Female; D005500:Follow-Up Studies; D006680:HLA Antigens / Q000032:analysis*; D015235:HLA-B Antigens / Q000032:analysis; D059908:HLA-B13 Antigen; D006801:Humans; D008297:Male; D008875:Middle Aged
chemical_list: D006680:HLA Antigens; D015235:HLA-B Antigens; D059908:HLA-B13 Antigen; C049278:HLA-B16 antigen; C037449:HLA-B17 antigen