Table 1.

Demographic and clinical characteristics of the patients.

	Patients
Age [years]	55 ± 16
Sex
Male	20 (67%)
Female	10 (33%)
Preoperative motor status
Paresis	16 (53%)
No paresis	14 (47%)
KPS
≤ 70%	7 (23%)
80%	5 (17%)
90%	10 (33%)
100%	8 (27%)
Affected hemisphere
Right	10 (33%)
Left	20 (67%)
Tumor localization
M1	11 (37%)
M2	7 (23%)
Subcortical	9 (30%)
Other	3 (10%)
Tumor histology
WHO III	4 (13%)
WHO III (rec.)	1 (3%)
WHO IV	23 (77%)
WHO IV (rec.)	2 (7%)
Tumor volume [ml]	29 ± 24
Edema within CST
Yes	11 (37%)
No	19 (63%)

Detailed overview on age (presented as mean ± SD), sex, preoperative motor status, KPS = Karnofsky performance score, tumor localization, histology (rec. = recurrent) and volume (presented as median ± IQR) and presence of edema. M1 = tumor infiltrates the motor cortex and approximates ≤ 8 mm to the CST, M2 = tumor seems to “touch” the motor cortex but does not infiltrate it nor approximate to CST ≤ 8 mm, subcortical = tumor is subcortically located and approximates ≤ 8 mm to the CST, other = tumor is not infiltrating or touching the motor cortex nor approximates ≤ 8 mm.