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Screening for colorectal cancer.

Bryan J Starkey1

  • 1Department of Clinical Biochemistry, Royal Surrey County Hospital Trust, Egerton Road, Guildford GU2 7XX, UK. bstarkey@royalsurrey.nhs.uk

Annals of Clinical Biochemistry
|July 16, 2002
PubMed
Summary

Colorectal cancer (CRC) screening aims to reduce mortality. Current methods like fecal occult blood tests are limited, but new DNA-based stool analysis shows future promise for more effective CRC detection.

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Area of Science:

  • Oncology
  • Gastroenterology
  • Preventive Medicine

Background:

  • Colorectal cancer (CRC) is a significant cause of mortality in the UK.
  • Screening reduces CRC mortality, but optimal methods are debated.
  • Current screening relies on fecal occult blood measurement with colonoscopy follow-up, reducing mortality by approximately 20%.

Purpose of the Study:

  • To review current colorectal cancer screening strategies.
  • To discuss limitations of existing methods.
  • To explore emerging technologies for improved CRC detection.

Main Methods:

  • Review of current colorectal cancer screening approaches.
  • Discussion of limitations of fecal occult blood testing.
  • Exploration of novel stool analysis techniques, including DNA-based methods.

Main Results:

  • Direct visualization (colonoscopy) is effective but invasive and costly for screening.
  • Fecal occult blood measurement is the current standard but has limitations.
  • Emerging stool analysis methods, such as detecting neoplasm-derived cellular products and altered DNA, show potential for improved sensitivity and specificity.

Conclusions:

  • While fecal occult blood testing reduces CRC mortality, advancements in stool analysis, particularly molecular techniques detecting DNA abnormalities, offer promising future strategies for more effective colorectal cancer screening.

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