title: Peripheral inflammatory arthritis in patients with chronic periaortitis: report of five cases and review of the literature.
abstract: OBJECTIVE
  Chronic periaortitis (CP) is a rare disease with a potentially immune-mediated pathogenesis. The study aims to report the frequency and the clinical characteristics of peripheral inflammatory arthritis in a cohort of CP patients, and to review the literature regarding the association between arthritis and CP.
  
  
  METHODS
  Forty-nine consecutive CP patients were seen at our department between 2000 and 2006; all of them underwent imaging (abdominal computed tomography and magnetic resonance imaging) and laboratory examinations, also including erythrocyte sedimentation rate, C-reactive protein and a panel of autoantibodies. The clinical history of the patients who developed peripheral inflammatory arthritis is reported in detail. A PubMed/Medline search without any date limits was performed for English-language articles reporting the association between CP and arthritis.
  
  
  RESULTS
  Five of the 49 enrolled patients developed an inflammatory form of peripheral arthritis: three were diagnosed as having RA, one palindromic rheumatism and one acute reactive arthritis. In all but one case, arthritis became clinically overt months to years after the onset of CP, and its outcome was good, since almost all patients were asymptomatic at the end of follow-up. No patient suffered from ankylosing spondylitis. In the literature review, 20 cases of CP-associated arthritis were found, mainly in the form of case reports: 14 of them were spondyloarthropathies, whereas the remaining ones were RA, juvenile RA or undifferentiated arthritis.
  
  
  CONCLUSIONS
  Peripheral inflammatory arthritis, particularly RA or RA-like forms, may develop in CP patients. This overlap strengthens the hypothesis of an autoimmune origin of CP.
authors.affiliation: Department of Clinical Medicine, Nephrology and Health Science, University of Parma, Parma, Italy. augusto.vaglio@virgilio.it
authors.forename: A
authors.initials: A
authors.lastname: Vaglio
authors.forename: A
authors.initials: A
authors.lastname: Palmisano
authors.forename: S
authors.initials: S
authors.lastname: Ferretti
authors.forename: F
authors.initials: F
authors.lastname: Alberici
authors.forename: I
authors.initials: I
authors.lastname: Casazza
authors.forename: C
authors.initials: C
authors.lastname: Salvarani
authors.forename: C
authors.initials: C
authors.lastname: Buzio
mesh_terms: D000305:Adrenal Cortex Hormones / Q000627:therapeutic use; D017677:Age Distribution; D000368:Aged; D018501:Antirheumatic Agents / Q000627:therapeutic use; D001172:Arthritis, Rheumatoid / Q000188:drug therapy / Q000453:epidemiology* / Q000473:pathology*; D001707:Biopsy, Needle; D015897:Comorbidity; D004359:Drug Therapy, Combination; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007150:Immunohistochemistry; D015994:Incidence; D008297:Male; D008875:Middle Aged; D012185:Retroperitoneal Fibrosis / Q000188:drug therapy / Q000453:epidemiology* / Q000473:pathology*; D018570:Risk Assessment; D012494:Sampling Studies; D012720:Severity of Illness Index; D017678:Sex Distribution; D016896:Treatment Outcome
chemical_list: D000305:Adrenal Cortex Hormones; D018501:Antirheumatic Agents