Management of newborn screening for severe combined immunodeficiency at a quaternary referral centre—an updated algorithm

Abstract

Severe combined immunodeficiency (SCID) is caused by critical genetic defects affecting the immune system. Early diagnosis and intervention are essential for preventing life-threatening infections, end-organ damage, and complications. Newborn screening for SCID is currently performed in many provinces and territories across Canada. The SickKids Newborn Screening Centre in Toronto, Ontario, is a quaternary referral centre that has evaluated SCID newborn screen-positive infants since the program’s introduction in 2013. Here, we provide updated algorithms for clinical investigation and follow-up of infants with an initial positive screen. Statement of novelty: We provide algorithms for the clinical follow-up of SCID newborn screen-positive infants at a quaternary referral centre.