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Dominguez-Valentin, Mev; Sampson, Julian R.; Seppala, Toni T.; ten Broeke, Sanne W.; Plazzer, John-Paul; Nakken, Sigve; Engel, Christoph; Aretz, Stefan; Jenkins, Mark A.; Sunde, Lone; Bernstein, Inge; Capella, Gabriel; Balaguer, Francesc; Thomas, Huw; Evans, D. Gareth; Burn, John; Greenblatt, Marc; Hovig, Eivind; Vos Tot Nederveen Cappel, Wouter H. de; Sijmons, Rolf H.; Bertario, Lucio; Tibiletti, Maria Grazia; Cavestro, Giulia Martina; Lindblom, Annika; Della Valle, Adriana; Lopez-Kostner, Francisco; Gluck, Nathan; Katz, Lior H.; Heinimann, Karl; Vaccaro, Carlos A.; Buettner, Reinhard; Goergens, Heike; Holinski-Feder, Elke; Morak, Monika; Holzapfel, Stefanie; Hueneburg, Robert; Knebel Doeberitz, Magnus von; Loeffler, Markus; Rahner, Nils; Schackert, Hans K.; Steinke-Lange, Verena; Schmiegel, Wolff; Vangala, Deepak; Pylvanainen, Kirsi; Renkonen-Sinisalo, Laura; Hopper, John L.; Win, Aung Ko; Haile, Robert W.; Lindor, Noralane M.; Gallinger, Steven; Le Marchand, Loic; Newcomb, Polly A.; Figueiredo, Jane C.; Thibodeau, Stephen N.; Wadt, Karin; Therkildsen, Christina; Okkels, Henrik; Ketabi, Zohreh; Moreira, Leticia; Sanchez, Ariadna; Serra-Burriel, Miquel; Pineda, Marta; Navarro, Matilde; Blanco, Ignacio; Green, Kate; Lalloo, Fiona; Crosbie, Emma J.; Hill, James; Denton, Oliver G.; Frayling, Ian M.; Rodland, Einar Andreas; Vasen, Hans; Mints, Miriam; Neffa, Florencia; Esperon, Patricia; Alvarez, Karin; Kariv, Revital; Rosner, Guy; Pinero, Tamara Alejandra; Gonzalez, Maria Laura; Kalfayan, Pablo; Tjandra, Douglas; Winship, Ingrid M.; Macrae, Finlay; Möslein, Gabriela; Mecklin, Jukka-Pekka; Nielsen, Maartje; Moller, Pal (2020): Cancer risks by gene, age, and gender in 6350 carriers of pathogenic mismatch repair variants: findings from the Prospective Lynch Syndrome Database. In: Genetics in Medicine, Vol. 22, No. 1: pp. 15-25
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Purpose: Pathogenic variants affecting MLH1, MSH2, MSH6, and PMS2 cause Lynch syndrome and result in different but imprecisely known cancer risks. This study aimed to provide age and organ-specific cancer risks according to gene and gender and to determine survival after cancer. Methods We conducted an international, multicenter prospective observational study using independent test and validation cohorts of carriers of class 4 or class 5 variants. After validation the cohorts were merged providing 6350 participants and 51,646 follow-up years. Results There were 1808 prospectively observed cancers. Pathogenic MLH1 and MSH2 variants caused high penetrance dominant cancer syndromes sharing similar colorectal, endometrial, and ovarian cancer risks, but older MSH2 carriers had higher risk of cancers of the upper urinary tract, upper gastrointestinal tract, brain, and particularly prostate. Pathogenic MSH6 variants caused a sex-limited trait with high endometrial cancer risk but only modestly increased colorectal cancer risk in both genders. We did not demonstrate a significantly increased cancer risk in carriers of pathogenic PMS2 variants. Ten-year crude survival was over 80% following colon, endometrial, or ovarian cancer. Conclusion Management guidelines for Lynch syndrome may require revision in light of these different gene and gender-specific risks and the good prognosis for the most commonly associated cancers.

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