Prevalence of Germline Pathogenic Variants in Cancer Predisposing Genes in Czech and Belgian Pancreatic Cancer Patients

Author:

Wieme GreetORCID,Kral Jan,Rosseel ToonORCID,Zemankova Petra,Parton BramORCID,Vocka MichalORCID,Van Heetvelde MattiasORCID,Kleiblova PetraORCID,Blaumeiser BettinaORCID,Soukupova JanaORCID,van den Ende Jenneke,Nehasil Petr,Tejpar Sabine,Borecka Marianna,Gómez García Encarna B.,Blok Marinus J.,Safarikova Marketa,Kalousova Marta,Geboes Karen,De Putter RobinORCID,Poppe Bruce,De Leeneer Kim,Kleibl ZdenekORCID,Janatova Marketa,Claes Kathleen B. M.ORCID

Abstract

(1) Background: The proportion and spectrum of germline pathogenic variants (PV) associated with an increased risk for pancreatic ductal adenocarcinoma (PDAC) varies among populations. (2) Methods: We analyzed 72 Belgian and 226 Czech PDAC patients by multigene panel testing. The prevalence of pathogenic variants (PV) in relation to personal/family cancer history were evaluated. PDAC risks were calculated using both gnomAD-NFE and population-matched controls. (3) Results: In 35/298 (11.7%) patients a PV in an established PDAC-predisposition gene was found. BRCA1/2 PV conferred a high risk in both populations, ATM and Lynch genes only in the Belgian subgroup. PV in other known PDAC-predisposition genes were rarer. Interestingly, a high frequency of CHEK2 PV was observed in both patient populations. PV in PDAC-predisposition genes were more frequent in patients with (i) multiple primary cancers (12/38; 32%), (ii) relatives with PDAC (15/56; 27%), (iii) relatives with breast/ovarian/colorectal cancer or melanoma (15/86; 17%) but more rare in sporadic PDAC (5/149; 3.4%). PV in homologous recombination genes were associated with improved overall survival (HR = 0.51; 95% CI 0.34–0.77). (4) Conclusions: Our analysis emphasizes the value of multigene panel testing in PDAC patients, especially in individuals with a positive family cancer history, and underlines the importance of population-matched controls for risk assessment.

Funder

Kom op tegen Kanker

Koning Boudewijnstichting

Ministerstvo Zdravotnictví Ceské Republiky

Univerzita Karlova v Praze

Publisher

MDPI AG

Subject

Cancer Research,Oncology

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