Phagocytic capacity of monocyte-derived macrophages before and after eltrombopag treatment in patients with ITP. (A) Representative histogram of intracellular fluorescence from 1 responder and 1 nonresponder before and after eltrombopag therapy. (B) Phagocytosis index of monocyte-derived macrophages before treatment and 6 weeks after eltrombopag treatment in 15 ITP responders and 6 nonresponders. Differences before and after treatment were determined by paired Student t tests. Differences between responders, nonresponders, and controls were determined by Mann-Whitney U tests.