title: Normalization of intestinal metaplasia in the esophagus and esophagogastric junction: incidence and clinical data.
abstract: BACKGROUND
  Attention has focused on whether normalization, regression, and development of dysplasia and cancer in specialized intestinal metaplasia (SIM) differ among long-segment Barrett's esophagus (LSBE), short-segment BE (SSBE), and esophagogastric junction SIM (EGJSIM). We prospectively followed a cohort of SIM patients receiving long-term antisecretory medications to determine: (a) histologic normalization (no evidence of SIM on biopsy), (b) change in SIM length, (c) incidence of dysplasia and cancer, and (d) factors associated with normalization.
  
  
  METHODS
  One hundred forty-eight patients with SIM were identified in our original cohort. Of these, 60.5% (23/38) LSBE, 69.8% (44/63) SSBE, and 72.3% (34/47) EGJSIM patients underwent repeat surveillance over a mean 44.4 +/- 9.7 months. Demographic, clinical, and endoscopic data were obtained.
  
  
  RESULTS
  (a) With long-term, antisecretory therapy, normalization occurred in 0/23 LSBE, 30% (13/44) of SSBE, and 68% (23/34) of EGJSIM (P < 0.001). (b) Normalization was more likely with EGJSIM (odds ratio [OR] 6.7, CI 2.3-19.3, P= 0.005), female gender (OR 7.3, CI 2.3-23.1, P= 0.001), or absence of hiatal hernia (OR 2.9, CI 1.02-8.06, P= 0.002). (c) A significant decrease in mean SIM length was noted for the entire population (2.5 +/- 0.3 to 2.13 +/- 0.3 cm, P= 0.004). (d) Follow-up incidence of dysplasia and cancer was 26.1% (3 indefinite, 2 low-grade dysplasia [LGD], 1 cancer) for LSBE, 6.8% (2 indefinite, 1 LGD) for SSBE, and none for EGJSIM (P < 0.004).
  
  
  CONCLUSIONS
  (a) Normalization of SIM occurs most frequently in EGJSIM>SSBE>LSBE. (b) Factors associated with normalization favor less severe GER and shorter segments of SIM. (c) Surveillance of LSBE results in the greatest yield for identifying dysplasia and cancer.
authors.affiliation: Department of Medicine, Gastroenterology Service, Walter Reed Army Medical Center, Washington, District of Columbia, USA.
authors.forename: J David
authors.initials: JD
authors.lastname: Horwhat
authors.forename: Darren
authors.initials: D
authors.lastname: Baroni
authors.forename: Corinne
authors.initials: C
authors.lastname: Maydonovitch
authors.forename: Eric
authors.initials: E
authors.lastname: Osgard
authors.forename: Eric
authors.initials: E
authors.lastname: Ormseth
authors.forename: Eugenia
authors.initials: E
authors.lastname: Rueda-Pedraza
authors.forename: Hyun J
authors.initials: HJ
authors.lastname: Lee
authors.forename: William K
authors.initials: WK
authors.lastname: Hirota
authors.forename: Roy K H
authors.initials: RK
authors.lastname: Wong
mesh_terms: D000368:Aged; D001706:Biopsy; D018450:Disease Progression; D016099:Endoscopy, Gastrointestinal; D004938:Esophageal Neoplasms / Q000453:epidemiology* / Q000473:pathology; D004943:Esophagogastric Junction / Q000473:pathology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D008297:Male; D008679:Metaplasia / Q000453:epidemiology / Q000473:pathology; D008875:Middle Aged; D015995:Prevalence; D011379:Prognosis; D011446:Prospective Studies; D012307:Risk Factors; D013274:Stomach Neoplasms / Q000453:epidemiology* / Q000473:pathology; D014481:United States / Q000453:epidemiology