Li Y, Thompson WK, Reuter C, et al. - In this cohort study of 11,679 demographically diverse US children (52.1% boys, mean [SD] age, 9.9 [0.62] years) aged 9 to 10 years, researchers sought to determine the overall prevalence of incidental findings (IFs) in brain MRI in the nonclinical pediatric population as well as the rates of specific findings and findings for which clinical referral is recommended. Children were selected through a broad school-based recruitment process in which all children of eligible age at selected schools were invited to partake. In the general pediatric population, both incidental brain MRI findings and findings of potential clinical significance are common. The ABCD research has the ability to ascertain the importance of several common IFs by evaluating IFs and concurrent developmental and health measures and observing these results over the duration of the longitudinal study.