REM2 and neoplasm: In 24 hours after administration of Fe(0) @  @ MCM-41 at dosage of 10 mg/kg the ReM2(H) response enhanced in tumor and in less extent in lungs, as well as the order of relative increase of MNP retention in tissues changed in the following way: muscle ≤ brain ≈ kidney ≈ heart < skin ≪ lungs < tumor < spleen < liver (Supplementary Fig. S3 and Table 1).