Tumor characteristics Number of patients (%)
Presentation
At first presentation/initial diagnosis 
Recurrent/progressive tumor (after prior therapy)
  09 (47.4%)
10 (52.6%)
Laterality  
Right
Left
Midline (including 2 spinal lesions)
  14 (63.7%)
05 (22.7%)
03 (13.6%)
Location
Skull-base
Peri-orbital
Parietal
Frontal
Temporal
Occipital
Cerebellar
Spinal
  04 (18.2%)
05 (22.8%)
06 (27.3%)
02 (09.1%)
01 (04.5%)
01 (04.5%)
01 (04.5%)
02 (09.1%)
Number of lesions
Single lesion
Multiple (3 patients with 2 discrete lesions each)
  16 (84.2%)
03 (15.8%)
Histological subtype (grade)
Meningothelial (grade I)
Angiomatous (grade I)
Psammomatous (grade I)
Transitional (grade I)
Fibroblastic (grade I)
Syncitial (grade I)
Chordoid (grade II)
Atypical (grade II)
Unverified (including patients with multiple tumors)
  07 (33.3%)
01 (04.8%)
01 (04.8%)
01 (04.8%)
01 (04.8%)
01 (04.8%)
03 (14.2%)
02 (09.5%)
05 (19.0%)
Table 1: Baseline tumor characteristics of the study cohort (N=19 patients, 22 lesions).