Parents' experiences with sequencing of all known pediatric cancer predisposition genes in children with cancer.

Purpose: Germline DNA sequencing is increasingly used within pediatric oncology, yet parental experiences remain underexplored.

Methods: Parents of children undergoing cancer predisposition gene panel sequencing (143 genes) were surveyed before and after disclosure of results. Questionnaires assessed knowledge, expectations, worries, satisfaction, and regret. Next to descriptives, linear mixed models and generalized mixed models were utilized to explore factors associated with knowledge and worries.

Results: Out of 325 eligible families, 310 parents (176 mothers and 128 fathers of 188 families) completed all after-consent questionnaires, whereas 260 parents (150 mothers and 110 fathers of 181 families) completed all after disclosure questionnaires. Most parents hoped their participation would benefit others, although individual hopes were also common. Sequencing-related worries were common, particularly concerning whether their child would get cancer again, cancer risks for family members and psychosocial implications of testing. Parental satisfaction after disclosure was high and regret scores were low. Lower education was associated with lower knowledge levels, whereas foreign-born parents were at increased risk of experiencing worries.

Conclusion: Germline sequencing of children with cancer is generally well received by their parents. However, careful genetic counseling is essential to ensure that parents are adequately informed and supported throughout the process.