ACSL4 and neoplasm: A recent study unveiled a novel mechanism by which CD8+ T cells kill tumor cells, proposing that arachidonic acid and IFN‐γ secreted by CD8+ T cells enhance the expression of acyl‐CoA synthetase long‐chain family member 4 (ACSL4), thereby promoting tumor cell ferroptosis and improving anti‐tumor immune efficacy [18].