CXCL10 and Castleman-Kojima disease: Recently, Iwaki et al. have performed serum analyses and have noted significantly higher levels of interferon γ-induced protein 10 kDa (IP-10) in patients with TAFRO syndrome than that in those with PC-type iMCD; they have also suggested the involvement of IP-10 in the pathogenesis of TAFRO syndrome [22].