Genetic Testing in Gastrointestinal Polyposis Syndromes: Considerations in Pediatrics.

Pediatric gastrointestinal polyps are frequently associated with an underlying hereditary syndrome associated with multisystem manifestations and increased risk of early-onset cancer. Thus, the identification of polyps in a child should prompt evaluation with genetic testing to (1) characterize the syndrome to determine next clinical steps including surveillance recommendations, and (2) conduct cascade testing to identify affected family members. Given the considerations for pediatric genetic testing, including autonomy and psychosocial stressors associated with the early detection of a cancer risk syndrome, it is important to conduct targeted testing. Herein, we propose a stepwise approach to genetic testing in the pediatric patient with gastrointestinal polyps.