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Molecular pathways in post-colonoscopy versus detected colorectal cancers: results from a nested case-control study.
- Source :
- British Journal of Cancer; Apr2022, Vol. 126 Issue 6, p865-873, 9p
- Publication Year :
- 2022
-
Abstract
- <bold>Background: </bold>Post-colonoscopy colorectal cancers (PCCRCs) pose challenges in clinical practice. PCCRCs occur due to a combination of procedural and biological causes. In a nested case-control study, we compared clinical and molecular features of PCCRCs and detected CRCs (DCRCs).<bold>Methods: </bold>Whole-genome chromosomal copy number changes and mutation status of genes commonly affected in CRC were examined by low-coverage WGS and targeted sequencing, respectively. MSI and CIMP status was also determined.<bold>Results: </bold>In total, 122 PCCRCs and 98 DCRCs with high-quality DNA were examined. PCCRCs were more often located proximally (P < 0.001), non-polypoid appearing (P = 0.004), early stage (P = 0.009) and poorly differentiated (P = 0.006). PCCRCs showed significantly less 18q loss (FDR < 0.2), compared to DCRCs. No significant differences in mutations were observed. PCCRCs were more commonly CIMP high (P = 0.014) and MSI (P = 0.029). After correction for tumour location, only less 18q loss remained significant (P = 0.005).<bold>Conclusion: </bold>Molecular features associated with the sessile serrated lesions (SSLs) and non-polypoid colorectal neoplasms (CRNs) are more commonly seen in PCCRCs than in DCRCs. These together with the clinical features observed support the hypothesis that SSLs and non-polypoid CRNs are contributors to the development of PCCRCs. The future focus should be directed at improving the detection and endoscopic removal of these non-polypoid CRN and SSLs.<bold>Clinical Trial Registration: </bold>NTR3093 in the Dutch trial register ( www.trialregister.nl ). [ABSTRACT FROM AUTHOR]
- Subjects :
- COLONOSCOPY
CASE-control method
COLORECTAL cancer
RESEARCH funding
Subjects
Details
- Language :
- English
- ISSN :
- 00070920
- Volume :
- 126
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- British Journal of Cancer
- Publication Type :
- Academic Journal
- Accession number :
- 155870178
- Full Text :
- https://doi.org/10.1038/s41416-021-01619-z