title: The frequency of sacroileitis and ankylosing spondylitis in inflammatory bowel disease and HLA-B27 association.
abstract: OBJECTIVE
  The aim of this study was to investigate the frequency of sacroileitis and ankylosing spondylitis in inflammatory bowel disease and the relationship between disease activity, joint symptoms and HLA-B27 antigen positivity.
  
  
  METHODS
  Sacroiliac joint radiography and three phase bone scanning of 33 ulcerative colitis patients (17 active and 16 in remission) and 29 Crohn's disease patients (15 active and 14 in remission) was performed. HLA-B27 was determined in all patients and 60 control subjects.
  
  
  RESULTS
  Sacroileitis was found in 10 out of 33 patients with ulcerative colitis (30. 30%) and seven out of 29 patients with Crohn's disease (24. 13%). Of these patients, eleven had active (17.73%) disease and six were in remission (9. 68%). The diagnosis of sacroileitis was made by bone radiography in seven patients (41.18%) and by bone scanning in the other 10 patients (58.82%). A diagnosis of ankylosing spondylitis was made in three patients (17. 64%) who had previously been diagnosed by bone radiography to have sacroileitis. HLA-B27 was positive in six patients (9.67%) with inflammatory bowel disease and three subjects (5%) of the control group. There were no significant differences between these two groups (p>0.05). Compared to the control group, all three patients with ankylosing spondylitis were HLA-B27 positive, the difference being significant (p>0. 01).
  
  
  CONCLUSIONS
  The clinical course of sacroileitis is independent of the activitiy of inflammatory bowel disease. Accordingly, patients with inflammatory bowel disease, especially those with sacroileitis, should be investigated for the presence of anklylosing spondylitis.
authors.affiliation: Yüksek Ihtisas Hospital, Department of Gastroenterology, Ankara.
authors.forename: Ali
authors.initials: A
authors.lastname: Türeyen
authors.forename: Ertuğrul
authors.initials: E
authors.lastname: Kayaçetin
authors.forename: Seniha
authors.initials: S
authors.lastname: Naldöken
authors.forename: Mustafa
authors.initials: M
authors.lastname: Balci
authors.forename: Aysel
authors.initials: A
authors.lastname: Ulker