title: [Colorectal cancer and ulcerative colitis--which patients should be checked?].
abstract: BACKGROUND
  Colonoscopy screening has been recommended as the method for preventing the development of cancer in ulcerative colitis. Factors that increase the risk of developing cancer are early onset of the disease, widespread disease, and a duration of over 10 years.
  
  
  METHODS
  The results of screening have been disappointing. A critical review of relevant publications is given.
  
  
  RESULTS
  Recent data have shown that the cancer risk in ulcerative colitis is lower than previously thought. One of the most important reasons seems to be the treatment with salazopyrine and 5-aminosalicylic acid.
  
  
  CONCLUSIONS
  Systematic follow-up of these patients by means of colonoscopy should include those who do not tolerate long-term medical treatment, patients with early onset of total colitis and protracted disease, and finally patients with higher risk of colorectal cancer because of their family history.
authors.affiliation: Medisinsk avdeling Sykehuset Østfold Fredrikstad 1601 Fredrikstad. bamoum@online.no
authors.forename: Bjørn
authors.initials: B
authors.lastname: Moum
mesh_terms: D003093:Colitis, Ulcerative / Q000150:complications / Q000175:diagnosis*; D003113:Colonoscopy / Q000706:statistics & numerical data*; D015179:Colorectal Neoplasms / Q000209:etiology / Q000517:prevention & control*; D006801:Humans; D008403:Mass Screening / Q000706:statistics & numerical data*; D018579:Patient Selection; D012307:Risk Factors