Fig. 6.

Box plots illustrating the distribution of the diffusion parameters and their intrahemispheric difference between the mesencephal and the peritumoral level, according to the postoperative motor outcome or status, respectively. Lower average FA-values within the tumorous CST (A) are significantly associated with postoperative deterioration of the motor system after 3 months. An existing motor deficit on day of discharge is in relation to higher average ADC-values within the tumorous CST (B). Comparison of the diffusion parameters in different locations (mesencephal vs. peritumoral) revealed that high differences could be especially found in patients with an impaired motor status on day of discharge (C) or after 3 months (D), respectively.