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Last Posted: May 23, 2023
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The "Scope" of Colorectal Cancer Screening in Lynch Syndrome: Is There an Optimal Interval?
Leah H Biller et al. J Natl Cancer Inst 2023 5

Across all genes related to Lynch syndrome, colonoscopy screening reduces the risk of CRC and improves overall survival among LS carriers, and remains the mainstay of current risk reduction recommendations. What remains less clear are both the optimal age at which to start screening and the best interval between colonoscopy screenings for LS carriers, such that many international professional society guidelines vary with respect to these recommendations.

Exploring the complex relationship between gut microbiota and risk of colorectal neoplasia using bidirectional Mendelian Randomization analysis.
Wanxin Li et al. Cancer Epidemiol Biomarkers Prev 2023 4

We find genetic liability to colorectal neoplasia may be associated with abundance of certain microbiota taxa. It is more likely that subset of CRC genetic liability variants changes gut biology by influencing both gut microbiota and CRC risk. This study highlights the need of future complementary studies to explore causal mechanisms linking both host genetic variation with gut microbiome and CRC susceptibility.

Early Detection of Molecular Residual Disease and Risk Stratification for Stage I to III Colorectal Cancer via Circulating Tumor DNA Methylation.
Shaobo Mo et al. JAMA Oncol

Are longitudinal changes in circulating tumor DNA (ctDNA) methylation effective in monitoring disease progression from molecular residual disease to recurrence? In this cohort study of 299 patients with colorectal cancer, circulating tumor DNA status was evaluated with 6 DNA methylation markers. The presence of ctDNA was strongly associated with recurrence before and after surgery, after adjuvant chemotherapy, and during longitudinal monitoring.

Liquid Biopsy Assessment of Molecular Residual Disease in Localized Colorectal Cancer: Is It Ready for Prime Time?
Juan Ruiz-Bañobre et al. JAMA Oncol

Over the last few years, the potential of liquid biopsy, specifically the detection of circulating tumor DNA (ctDNA) in blood from patients with advanced and localized tumors, has emerged as a promising strategy to assist in the clinical management of patients with cancer. In the advanced setting, ctDNA is already validated and used in routine clinical practice to identify clinically actionable genomic alterations. In the localized setting, different observational studies involving patients with solid tumors have confirmed a very high risk of recurrence when ctDNA is detected after therapy with curative intent, introducing the concept of molecular residual disease in managing solid tumors.

Disclaimer: Articles listed in the Public Health Genomics and Precision Health Knowledge Base are selected by the CDC Office of Public Health Genomics to provide current awareness of the literature and news. Inclusion in the update does not necessarily represent the views of the Centers for Disease Control and Prevention nor does it imply endorsement of the article's methods or findings. CDC and DHHS assume no responsibility for the factual accuracy of the items presented. The selection, omission, or content of items does not imply any endorsement or other position taken by CDC or DHHS. Opinion, findings and conclusions expressed by the original authors of items included in the update, or persons quoted therein, are strictly their own and are in no way meant to represent the opinion or views of CDC or DHHS. References to publications, news sources, and non-CDC Websites are provided solely for informational purposes and do not imply endorsement by CDC or DHHS.