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Related Experiment Videos

Serum selenium and colonic neoplastic risk

R L Nelson1, F G Davis, E Sutter

  • 1Department of Surgery, University of Illinois at Chicago, USA.

Diseases of the Colon and Rectum
|December 1, 1995
PubMed
Summary

This study found no evidence that higher serum selenium levels protect against colorectal polyps or cancer. Selenium levels did not show a protective trend for either benign or malignant tumors in the colon.

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Area of Science:

  • Oncology
  • Nutritional Science
  • Epidemiology

Background:

  • Selenium deficiency is linked to increased cancer risk in various organs.
  • The role of selenium in colorectal neoplasia requires further investigation.

Purpose of the Study:

  • To investigate the association between serum selenium levels and the risk of colorectal adenomas and cancer.
  • To determine if higher selenium concentrations offer a protective effect against colonic tumors.

Main Methods:

  • A case-control study involving 138 controls, 139 adenoma patients, and 25 cancer patients.
  • Serum selenium levels were measured and categorized into quartiles.
  • Adjusted odds ratios were calculated, controlling for multiple risk factors.

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Main Results:

  • No significant trend was observed for adenoma risk across increasing selenium quartiles (ORs ranging from 1.4 to 1.8).
  • For cancer patients, odds ratios also did not show a clear protective effect with higher selenium levels (ORs ranging from 0.8 to 1.7).

Conclusions:

  • Higher serum selenium levels do not appear to offer a protective effect against the development of benign or malignant colorectal tumors.
  • The study did not detect a trend indicating selenium's protective role in colonic neoplasia.