The DAMP molecules released in the ICD cascade are uptaken by antigen‐presenting cells (APCs), such as DCs, for recognition, processing, and presentation, thus activating the immune system.[33] The in vitro DC maturation induced by tumor ICD was analyzed by determining the frequency of mature DCs (CD11c+CD80+CD86+) after culturing drug‐treated 4T1 cells with bone marrow‐derived DCs from BALB/c mice (Figure 3f; Figure S12, Supporting Information). Here, CD86 is linked to neoplasm.