Fig. 4. FA values according to stages. FA is decreased from the covert stage (p<0.001). There is no difference associated with the presence of HSIC (glioma III/IV (-) vs. glioma III/IV (+), p=0.943). p-values are marked in the graph after the Mann-Whitney U test. FA, fractional anisotropy; FLAIR, fluid attenuated inversion recovery; HSIC, high signal change at the level of the internal capsule in FLAIR magnetic resonance imaging.