title: Ulcerative colitis, seronegative spondyloarthropathies and allergic diseases: the search for a link.
abstract: BACKGROUND
  Allergic diseases and seronegative spondyloarthropathies are frequently observed in ulcerative colitis (UC). In this report we have investigated possible relationships between IgE-mediated allergic disease (AD), allergic contact dermatitis (ACD) and seronegative spondyloarthropathy (SpA) in UC patients at different grades and extensions of mucosa inflammation.
  
  
  METHODS
  Forty-five UC consecutive outpatients were graded according to clinical, endoscopic and histologic activity scores. SpA was diagnosed according to the European Spondyloarthropathy Study Group criteria. AD was detected by skin prick tests and confirmed by specific provocation tests, while ACD was diagnosed using the European standard series of patch tests. Thirty-seven patients' spouses or partners served as controls.
  
  
  RESULTS
  Fourteen patients and 1 control subject showed SpA (P = 0.001). Diagnosis of rhinitis, conjunctivitis or asthma was made in 19 patients and in 5 controls (P = 0.004), while ACD was found in 10 and in 4 (P = 0.17), respectively. In UC, AD coexisted with SpA in 2 cases (P = 0.01), AD with ACD in 1 case (P = 0.03) and ACD with SpA in 5 (P = 0.24).
  
  
  CONCLUSIONS
  Notwithstanding the high frequency of AD and SpA found in UC, the concurrence of AD with SpA or ACD is an unusual finding, while SpA and ACD may coexist. These data suggest that, in UC, atopy and seronegative arthritis, as well as atopy and delayed-type allergy, are strongly polarized conditions tending to mutual exclusion. In UC, the presence of AD without SpA or ACD, and of SpA or ACD without AD may indicate subgroups of patients in which T-helper-2 cell or T-helper-1 cell responses predominate.
authors.affiliation: Institute of Gastroenterology, Faculty of Medicine, University Federico II of Naples, Italy. darienzo@unina.it
authors.forename: A
authors.initials: A
authors.lastname: D'Arienzo
authors.forename: F
authors.initials: F
authors.lastname: Manguso
authors.forename: R
authors.initials: R
authors.lastname: Scarpa
authors.forename: C
authors.initials: C
authors.lastname: Astarita
authors.forename: F P
authors.initials: FP
authors.lastname: D'Armiento
authors.forename: R
authors.initials: R
authors.lastname: Bennato
authors.forename: D
authors.initials: D
authors.lastname: Gargano
authors.forename: M
authors.initials: M
authors.lastname: Sanges
authors.forename: G
authors.initials: G
authors.lastname: Mazzacca
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003093:Colitis, Ulcerative / Q000097:blood / Q000150:complications* / Q000276:immunology; D017449:Dermatitis, Allergic Contact / Q000097:blood / Q000150:complications* / Q000276:immunology; D005260:Female; D005753:Gastric Mucosa / Q000503:physiopathology; D015796:HLA-B27 Antigen / Q000097:blood; D006801:Humans; D006969:Hypersensitivity, Immediate / Q000097:blood / Q000150:complications* / Q000276:immunology; D008297:Male; D008875:Middle Aged; D012698:Serologic Tests; D012720:Severity of Illness Index; D025242:Spondylarthropathies / Q000097:blood / Q000150:complications* / Q000276:immunology
chemical_list: D015796:HLA-B27 Antigen