First-week expansion of activated peripheral B-cell subsets is associated with grade 3 or higher immune-related adverse events after nivolumab plus ipilimumab
This prospective study demonstrates that the expansion of activated peripheral B-cell subsets within the first week of nivolumab plus ipilimumab treatment is significantly associated with the subsequent development of severe (grade 3 or higher) immune-related adverse events, suggesting early B-cell monitoring as a potential biomarker for risk stratification.