PTPRC and transient ischemic attack: Similarly, EVs derived from circulating immune cells, granulocytes (CD66+; Figure 2F) and leukocytes (CD45+; Figure 2G), were also significantly higher in TIA and AIS patients compared to controls although there was a non-significant trend for AIS patients to express more of these two EV subtypes compared to TIA patients (Figures 2F,G).