title: A systematic review of the association between Barrett's esophagus and colon neoplasms.
abstract: OBJECTIVE
  Patients with Barrett's esophagus may be at increased risk of colon neoplasms, including cancer. However, different studies of this have yielded conflicting results. The objective of this analysis was to review all existing published data in an attempt to determine whether there is such an association and, if so, to estimate the level of risk.
  
  
  METHODS
  We have reviewed all of the published studies examining the prevalence of colon neoplasms in patients with Barrett's esophagus. We have compared these with a cohort of patients drawn from the general population and participating in colorectal cancer screening programs.
  
  
  RESULTS
  The prevalence of colon cancer in patients with Barrett's esophagus was 7.6% compared with 1.6% in the control group. The pooled odds ratio for colon cancer in Barrett's esophagus was 5.19 (p < 0.0001). In a small subgroup analysis, the odds ratio for colon cancer in patients identified as having Barrett's esophagus with specialized columnar epithelium was 8.71 (p < 0.0001).
  
  
  CONCLUSIONS
  We conclude that patients with Barrett's esophagus have an increased risk of colon cancer. This may be particularly true in those patients with specialized columnar epithelium.
authors.affiliation: Department of Internal Medicine, University of South Carolina School of Medicine, Columbia, USA.
authors.forename: C W
authors.initials: CW
authors.lastname: Howden
authors.forename: C A
authors.initials: CA
authors.lastname: Hornung
mesh_terms: D001471:Barrett Esophagus / Q000150:complications*; D003110:Colonic Neoplasms / Q000150:complications*; D006801:Humans; D016017:Odds Ratio; D012307:Risk Factors