We found that CTR-KD MM cells had fewer lipid ROS than LILRB1-KD MM cells (Fig. 2r, s), and the percentage and number of CTR-KD MM cells in the BM of tumor-bearing mice were significantly higher than those bearing LILRB1-KD MM cells (Supplementary Fig. 2e, f). Here, LILRB1 is linked to neoplasm.