Lynch syndrome: influence of additional susceptibility variants on cancer risk - Sorbonne Université
Article Dans Une Revue European Journal of Human Genetics Année : 2023

Lynch syndrome: influence of additional susceptibility variants on cancer risk

Albain Chansavang
Franck Bielle

Résumé

Some patients with Lynch syndrome (LS) have extreme phenotypes, i.e. cancer before the recommended screening age, or cancer for which there are no screening guidelines. We made the hypothesis that additional germline variants in cancer susceptibility genes (CSG) could explain some of these phenotypes. We compared the prevalence of additional CSG variants in LS patients with a cancer diagnosis before age 30 (early-onset, EO group) and after 40 (usual-onset, UO group). While there was no overall difference, we did find an excess of pathogenic variants and variants of unknown significance in EO cases when only gastrointestinal CSG were considered (OR 2.25; 95% CI: 1.01-5.06, p value = 0.04). Four EO cases stood out: two with POLE/POLD1 variants in the key exonuclease domain, one with a BMPR1A duplication and one with an EPCAM deletion. Additional germline variants should be considered in future screening recommendations, as they might influence cancer risk.

Dates et versions

hal-04092022 , version 1 (09-05-2023)

Identifiants

Citer

Roseline Vibert, Jasmine Hasnaoui, Alexandre Perrier, Alexandra Lefebvre, Chrystelle Colas, et al.. Lynch syndrome: influence of additional susceptibility variants on cancer risk. European Journal of Human Genetics, 2023, 15 (1), pp.22. ⟨10.1038/s41431-023-01367-z⟩. ⟨hal-04092022⟩
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