ALB and neoplasm: The hybrid nanosystems composed of MNPs (particularly IONPs) and HSA can be used for different medical applications: targeted delivery of biologically active substances and drugs (passive targeting due to the effect of increased vascular permeability of the tumor vessels, active targeting using biovectors or magnetic field retention capabilities) and advanced release of drugs at the target location; photothermal therapy (PTT) and magnetic hyperthermia to tumors; the contrast enhancement in magnetic resonance imaging (MRI) of tumor tissues [15,16,17,18,19,20,21,22].