MRIAN‐Dox treatment remarkably recovered the number of macrophages (Figure 5g), DCs (Figure 5h), NKs (Figure 5i), CD4+ T cells (Figure 5j), CD8+ cells (Figure 5k), CD3+CD8+IFNγ+ cytotoxic T lymphocyte (CTL) (Figure 5l), and CD3+CD4+IFNγ+ Type 1 T helper (Th1 cells) (Figure 5m) more efficiently than Dox treatment in the BM of T‐ALL mice. Here, IFNG is linked to acute lymphoblastic leukemia.