Endothelial damage by antibody and complement triggers thrombosis. When antibodies enter the graft, they encounter the donor endothelium, hence the reaction occurs primarily in the vasculature. These suggest severe ischemia and possibly coagulative necrosis of the cortex due to vascular thromboses. The pink area in the cortex where cell outlines are preserved is an area of coagulation necrosis. It is caused by the vascular thrombosis.
Cellular rejection is manifested as an interstitial infiltrate of lymphocytes and macrophages.
These lymphocytes are T cells. Humoral rejection manifests as endothelial injury with thrombosis and resultant coagulation necrosis. Not in this field. Here, only lymphocytes are seen. Chronic rejection takes months to years.