In vitro, dexamethasone impairs the activation and killing ability of tumor-infiltrating lymphocytes, however after withdrawal this function restored.15 In mice, early use of corticosteroids shows signs of tumor regrowth, because of a lasting impaired anti-tumor response with reduction of CD8+ memory T cells.16 When corticosteroids were administered later, i.e. after tumor regression, this effect was not seen. Here, CD8A is linked to neoplasm.