However, two of them found that CIDP patients show lower Fcγ receptor IIB (FcγRIIB) expression levels on naive B cells and FcγRIIB expression levels fail to upregulate as B-cell progress from the naïve to the memory compartment compared to healthy controls [27, 28]. Here, FCGR2B is linked to chronic inflammatory demyelinating polyradiculoneuropathy.