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Narrow band imaging for colonoscopic surveillance in hereditary non-polyposis colorectal cancer

  • 0Wolfson Unit for Endoscopy, St Mark's Hospital, Watford Road, Harrow, Middlesex HA1 3UJ, UK. jameseast6@yahoo.com
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August 8, 2007

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August 8, 2007

View abstract on PubMed

Summary

This summary is machine-generated.

Narrow band imaging (NBI) significantly improved adenoma detection during colonoscopic surveillance for hereditary non-polyposis colorectal cancer (HNPCC). This enhanced visualization, particularly for flat adenomas, may help reduce future interval cancers in high-risk patients.

Area Of Science

  • Gastroenterology
  • Endoscopy
  • Oncology

Background

  • Colonoscopic surveillance is crucial for hereditary non-polyposis colorectal cancer (HNPCC) but can miss aggressive adenomas.
  • Narrow band imaging (NBI) enhances visualization of mucosal capillaries, improving adenoma contrast.

Purpose Of The Study

  • To evaluate if a second colonoscopic pass using NBI in the proximal colon increases adenoma detection in HNPCC patients.

Main Methods

  • 62 HNPCC patients underwent two back-to-back colonoscopic examinations (caecum to sigmoid-descending junction).
  • The first pass used high-definition white light, followed by a second pass with NBI.
  • All detected polyps were removed and analyzed histopathologically.

Main Results

  • NBI detected additional proximal colon adenomas in 17% of patients (27% with white light alone vs. 42% with both).
  • The total adenoma count increased from 25 to 46 after NBI (p<0.001).
  • NBI significantly improved detection of flat adenomas (45% vs. 12% with white light, p=0.03).

Conclusions

  • NBI enhances adenoma detection during HNPCC surveillance, especially for flat lesions.
  • This improved detection may contribute to reducing interval colorectal cancer rates in HNPCC patients.

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