The extent of Barrett's esophagus depends on the status of the lower esophageal sphincter and the degree of esophageal acid exposure.
OBJECTIVE
The purpose of this study was to assess whether the extent of intestinal metaplasia is related to the severity of the gastroesophageal reflux disease.


METHODS
A total of 556 consecutive patients with symptoms suggestive of foregut disease had upper gastrointestinal endoscopy with extensive biopsies from the gastroesophageal junction and the esophagus. All patients had esophageal motility and 24-hour pH monitoring. In 411 patients, cardiac-type mucosa was identified; in 147 patients, the cardiac-type mucosa showed intestinal metaplasia. They were divided into 3 groups based on the extent of intestinal metaplasia commonly seen clinically: long segments (>3 cm), short segments (<3 cm), and limited to the gastroesophageal junction. The duration of symptoms, the status of the lower esophageal sphincter, the degree of esophageal acid exposure, and the time to clear a reflux episode were assessed in each group.


RESULTS
The presence of intestinal metaplasia in cardiac-type mucosa was associated with the hallmarks of gastroesophageal reflux disease. The extent of intestinal metaplasia correlated strongly with the degree of esophageal acid exposure (r = 0.711; P <.001) and inversely with the lower esophageal sphincter pressure (r = 0.351; P <.001) and length (r = 0. 259; P =.002). Patients with a long segment of intestinal metaplasia (>3 cm) had longer duration of symptoms (16 years) than those patients with a segment of intestinal metaplasia less than 3 cm (10 years; P =.048) or those patients with intestinal metaplasia limited to the gastroesophageal junction (10 years; P =.01).


CONCLUSIONS
The extent of intestinal metaplasia, that is, Barrett's esophagus, is related to the status of the lower esophageal sphincter and the degree of esophageal acid exposure.
Oberg
S
S
University of Southern California, Department of Surgery, Los Angeles, CA, USA.
DeMeester
T R
TR
Peters
J H
JH
Hagen
J A
JA
Nigro
J J
JJ
DeMeester
S R
SR
Theisen
J
J
Campos
G M
GM
Crookes
P F
PF
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001471:Barrett Esophagus / Q000473:pathology* / Q000503:physiopathology; D004943:Esophagogastric Junction / Q000503:physiopathology*; D004945:Esophagoscopy; D004947:Esophagus / Q000378:metabolism / Q000473:pathology; D005260:Female; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D008679:Metaplasia; D008875:Middle Aged; D009092:Mucous Membrane / Q000378:metabolism / Q000473:pathology; D010528:Peristalsis