CCL2 and hematoma: It was an enhanced release of TNF-α, IL-1β, IL-2 and IL-4 in blood compared with values in hematoma fluid and an enhanced release of IL-2R, IL-5, IL-6, IL-7, IL-10, IL-13, CCL2, CXCL8, CXCL9 and CXCL10 in hematoma fluid compared with venous blood.