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Wagener, Rabea; Taeubner, Julia; Walter, Carolin; Yasin, Layal; Alzoubi, Deya; Bartenhagen, Christoph; Attarbaschi, Andishe; Classen, Carl-Friedrich; Kontny, Udo; Hauer, Julia; Fischer, Ute; Dugas, Martin; Kuhlen, Michaela; Borkhardt, Arndt; Brozou, Triantafyllia
European journal of human genetics, 08/2021, Volume: 29, Issue: 8Journal Article
In childhood cancer, the frequency of cancer-associated germline variants and their inheritance patterns are not thoroughly investigated. Moreover, the identification of children carrying a genetic predisposition by clinical means remains challenging. In this single-center study, we performed trio whole-exome sequencing and comprehensive clinical evaluation of a prospectively enrolled cohort of 160 children with cancer and their parents. We identified in 11/160 patients a pathogenic germline variant predisposing to cancer and a further eleven patients carried a prioritized VUS with a strong association to the cancerogenesis of the patient. Through clinical screening, 51 patients (31.3%) were identified as suspicious for an underlying cancer predisposition syndrome (CPS), but only in ten of those patients a pathogenic variant could be identified. In contrast, one patient with a classical CPS and ten patients with prioritized VUS were classified as unremarkable in the clinical work-up. Taken together, a monogenetic causative variant was detected in 13.8% of our patients using WES. Nevertheless, the still unclarified clinical suspicious cases emphasize the need to consider other genetic mechanisms including new target genes, structural variants, or polygenic interactions not previously associated with cancer predisposition.
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