Pediatric and adult multiple sclerosis (MS) share many genetic variants suggesting similar biological processes are present, a recent study found. Major histocompatibility complex (MHC) variants beyond HLA–DRB1*15:01 and HLA–A*02 are also associated with pediatric-onset MS (POMS). Researchers comprehensively investigated the association between established MHC and non-MHC adult MS-associated variants and susceptibility to POMS. Cases with onset <18 years (n=569) and controls (n=16,251) were included. Adjusted logistic regression and meta-analyses were performed for individual risk variants and a weighted genetic risk score (wGRS) for non-MHC variants. Results were compared to adult MS cases (n= 7,588). They found: