Colonoscopic screening of first-degree relatives of patients with large adenomas: increased risk of colorectal tumors. - Archive ouverte HAL Access content directly
Journal Articles Gastroenterology Year : 2007

Colonoscopic screening of first-degree relatives of patients with large adenomas: increased risk of colorectal tumors.

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Abstract

Background & Aims: The risk of developing colorectal neoplasia is not well established among family members of individuals with large adenomas and screening strategies remain under debate in this population. This study aimed at quantifying the risk of colorectal adenomas and cancers using colonoscopic screening in first-degree relatives of patients with large adenomas. Methods: This case-control study was performed in 18 endoscopic units of French non-University Hospitals. A colonoscopy was offered to first-degree relatives of 306 index cases with adenomas ≥ 10 mm, if they were alive, aged 40-75 and could be contacted by the index case. Among 674 relatives meeting these criteria, 168 were examined and matched for age, gender, and geographical area with two controls (n=307). Controls were randomly selected from 1362 consecutive patients aged 40-75 having undergone a colonoscopy for minor symptoms. Results: The overall prevalence of large adenomas was 8.4% and 4.2% in relatives and controls, respectively. Odds ratios (OR) associated with a history of large adenomas in relatives were 2.27 (95% confidence interval [CI]: 1.01-5.09) for cancers or large adenomas and 1.21 (95% CI: 0.68-2.15) for small adenomas, and 1.56 (95% CI: 0.96-2.53) for all colorectal neoplasia. The risk of large adenomas and cancers was higher in relatives of index cases younger than 60 years (OR: 3.82; 95% CI: 0.92-15.87) and when the index case had large distal adenomas (OR, 3.14; 95% CI: 1.27-7.73). Conclusion: First-degree relatives of patients with large adenomas are at increased risk of developing colorectal cancers or large adenomas. This result has implications for screening in this high-risk population.
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Origin : Files produced by the author(s)
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Dates and versions

inserm-00359900 , version 1 (09-02-2009)

Identifiers

  • HAL Id : inserm-00359900 , version 1
  • PUBMED : 17919484

Cite

Vanessa Cottet, Alexandre Pariente, Bernard Nalet, Jacques Lafon, Chantal Milan, et al.. Colonoscopic screening of first-degree relatives of patients with large adenomas: increased risk of colorectal tumors.: Adenomas in relatives and colorectal tumor risk. Gastroenterology, 2007, 133 (4), pp.1086-1092. ⟨inserm-00359900⟩
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