recently proposed another application in addition to the potential of inducing PTT, triggered drug release, and being magnetically guidable by iron oxide NPs (IONs).[54] Based on the fact that intracellular presence of iron ions can induce a tumor necrosis factor alpha (TNF‐α) associated proinflammatory immune response in the Mφs, they attempted to educate tumor‐associated Mφs (TAMs) with ex vivo engineered Mφs to activate a strong antitumor response (Figure 6a). The gene discussed is TNF; the disease is neoplasm.