The viscous-to-elastic ratio relates to tumour severity, with animal models of gliomas showing a 22% decrease in relative viscosity over just a four-week period of tumour growth.53 A second study showed that these declines in viscosity can be slowed or potentially entirely reversed, as mice with glioblastomas, who were treated with B20 anti-VEGF-antibody, showed a higher relative tissue viscosity at all-time points than mice left untreated.52 Understanding how treatment impacts tumour mechanics is a nascent but growing area of research. Here, VEGFA is linked to neoplasm.