To further confirm this, we performed immunohistochemical (IHC) staining for the pan-macrophage marker CD68 19, M1-like and M2b-like macrophage markers CD86 20, M2a-like macrophage marker CD206, and M2c-like macrophage marker CD163 21-23 in serial histological sections of EBV-associated tumours. Here, CD68 is linked to neoplasm.