Abstract
Lynch syndrome is the most frequent hereditary colorectal cancer (CRC) syndrome, affecting approximately 1 in 300 in the Western population. It is caused by pathogenic variants in the mismatch repair (MMR) genes including MLH1, MSH2 (EPCAM), MSH6 and PMS2, and is associated with high risks of CRC, endometrial cancer and other cancers. In view of these risks, carriers of such variants are encouraged to participate in colonoscopic surveillance programs that are known to substantially improve their prognosis. In the last decade several important studies have been published that provide detailed cancer risk estimates and prognoses based on large numbers of patients. These studies also provided new insights regarding the pathways of carcinogenesis in CRC, which appear to differ depending on the specific MMR gene defect. In this report, we will discuss the implications of these new findings for the development of new surveillance protocols.
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Acknowledgements
I am very gratefull for all scientific discussions with Aysel Ahadova, Christoph Engel, Juul Wijnen, Wouter de Vos tot Nederveen Cappel and Matthias Kloor, that greatly improved the manuscript.
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I want to dedicate this report to Henry Lynch, who passed away on June the 2nd, 2019 at the age of 91. Henry spent practically his whole life researching hereditary cancer and in doing so saved the lives of countless individuals genetically predisposed to cancer. As Henry and I had the same goals in research, we successfully collaborated as colleagues and friends for more than 30 years. He is still sorely missed.
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Vasen, H.F.A. Progress Report: New insights into the prevention of CRC by colonoscopic surveillance in Lynch syndrome. Familial Cancer 21, 49–56 (2022). https://doi.org/10.1007/s10689-020-00225-x
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DOI: https://doi.org/10.1007/s10689-020-00225-x