 The study aimed to estimate the expression of regulatory B cells, Brex, in a pediatric cohort with autoimmune thyroid diseases, AITD, and healthy controls, finding a reduction in Illinois, 10 production in Brex with specific phenotypes in both untreated and treated AITD, suggesting that this reduction could be responsible for breaking immune tolerance and developing AITD in children. This article was authored by Carolina Stasek, Camille Gropchak, Viviana Morolda, and others.