BCR and Miyoshi myopathy: The utilization of this approach supplements the traditional biochemical analysis technique for exosomes and presents a fresh concept for the diagnosis of MM.750 Iaccino et al. discovered that MM exosomes could express the B cell receptor for immunoglobulin (Ig-BCR) and could be targeted by specific binding peptides (Id-peptides).751 Identifying MM-released exosomes using heparin or the Id peptide could potentially serve as a highly sensitive diagnostic approach for evaluating disease progression in the clinical setting.