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Erschienen in:
01.03.2011 | Original Article
Computer-Assisted Brush-Biopsy Analysis for the Detection of Dysplasia in a High-Risk Barrett’s Esophagus Surveillance Population
Erschienen in: Digestive Diseases and Sciences | Ausgabe 3/2011
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Background
Barrett’s epithelial dysplasia, the direct precursor to esophageal adenocarcinoma, is often unapparent and frequently missed during surveillance of Barrett’s esophagus with four-quadrant forceps biopsy protocol.
Aim
To determine whether the detection of dysplasia is improved by adding computer-assisted brush biopsy (EndoCDx©) to four-quadrant biopsy protocol.
Methods
Patients with a history of Barrett’s esophagus with dysplasia scheduled for endoscopic surveillance were recruited from four academic medical centers. Patients underwent brush biopsy followed by four-quadrant biopsy every 1–2 cm. The results from brush and forceps biopsy were reviewed independently by pathologists blinded to the other’s results.
Results
Among 151 patients enrolled (124 men, 27 women; mean age: 65), 117 (77.5%) had forceps and brush-biopsy specimens adequate for interpretation. The mean number of forceps biopsies was 11.9 (median 10, range 2–40) and brush biopsies was 2.0 (median 2, range 1–4). The overall yield of forceps alone was 25.2% (n = 38). Brush biopsy added an additional 16 positive cases increasing the yield of dysplasia detection by 42% (95% CI: 20.7–72.7). The number needed to test (NNT) to detect one additional case of dysplasia was 9.4 (95% CI: 6.4–17.7). There were no significant differences in results among different centers, between standard versus jumbo forceps, or between forceps biopsies taken every 1 cm versus every 2 cm.
Conclusions
These data suggest that computer-assisted brush biopsy is a useful adjunct to standard endoscopic surveillance regimens for the identification of dysplasia in Barrett’s esophagus.