GYPA and acquired polycythemia vera: The subtype of monocyte mainly found to have more RBC-derived material was I-MCs among all monocytes, and when comparing both groups of individuals, C-MC and I-MC from PV patients were able to uptake more RBCs than their counterparts from HC, as seen in the percentage and MFI of intracellular glycophorin A (Figure 2C,D).