Novel Genetic Causes of Gastrointestinal Polyposis Syndromes

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Abstract

Hereditary polyposis syndromes are characterized by a large number and/or histopathologically specific polyps in the gastrointestinal tract and a high risk of both colorectal cancer and extracolonic cancer at an early age. While the genes responsible for some of the syndromes, eg, APC in familial adenomatous polyposis and STK11 in Peutz-Jeghers syndrome, have been known for decades, novel genetic causes have recently been detected that have shed light on the broader clinical spectrum of syndromes. Genetic diagnoses are important because they can facilitate a personalized surveillance program. Furthermore, at-risk members of the patient’s family can be tested and enrolled in surveillance as needed. In some cases, prenatal diagnostics should be offered. In this paper, we describe the development in germline genetics of the hereditary polyposis syndromes over the last 10–12 years, their clinical characteristics, as well as how to implement genetic analyses in the diagnostic pipeline.

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Jelsig, A. M., Byrjalsen, A., Madsen, M. B., Kuhlmann, T. P., Hansen, T. van O., Wadt, K. A. W., & Karstensen, J. G. (2021). Novel Genetic Causes of Gastrointestinal Polyposis Syndromes. Application of Clinical Genetics. Dove Medical Press Ltd. https://doi.org/10.2147/TACG.S295157

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