FcγR expression on monocytes from patients with ITP before or after eltrombopag treatment. (A) Representative scattergrams of surface expression of CD14⁺ monocytes from a patient with ITP. R1 represented CD14⁺ monocytes. (B) Representative histogram of MFI of FcγRI/CD64, FcγRII/CD32, FcγRIIb/CD32b, and FcγRIII/CD16 from a responder and a nonresponder before and after eltrombopag therapy. (C) MFI of FcγRI/CD64, FcγRII/CD32, FcγRIIb/CD32b, and FcγRIII/CD16 on monocytes before treatment and 6 weeks after eltrombopag treatment in 15 ITP responders and 6 responders. Differences before and after treatment were determined by paired Student t tests.