Table 2 Tumor imaging data of the patients in the two groups

Mean greatest tumor dimension (cm)

4.7 ± 0.8

4.8 ± 0.9

4.5 ± 0.6

0.207

Infiltrate regions (%)

 Sphenoid sinus

29 (58.0%)

19 (70.4%)

10 (43.5%)

0.055

 Clivus

12 (24.0%)

8 (29.6%)

4 (17.4%)

0.313

 Sella diaphragm

33 (66.0%)

19 (70.4%)

14 (60.9%)

0.480

 Third ventricle

23 (46.0%)

12 (44.4%)

11 (47.8%)

0.811

 Lateral ventricle

6 (12.0%)

3 (11.1%)

3 (13.0%)

0.834

 Interpeduncular cistern

21 (42.0%)

9 (33.3%)

12 (52.2%)

0.179

 Anterior skull base

30 (60.0%)

18 (66.7%)

12 (52.2%)

0.297

 Parasella

18 (36.0%)

12 (44.4%)

6 (26.1%)

0.178

 Circle of Willis

19 (38.0%)

12 (44.4%)

7 (30.4%)

0.309

KS grade (%)

0.177

 Grade I

9 (18.0%)

2 (7.4%)

7 (30.4%)

 Grade II

14 (28.0%)

9 (33.3%)

5 (21.7%)

 Grade III

14 (28.0%)

8 (29.6%)

6 (26.1%)

 Grade IV

13 (26.0%)

8 (29.6%)

5 (21.7%)

Hardy grade (%)

0.325

 Grade III

19 (38.0%)

8 (29.6%)

11 (47.8%)

 Grade IV

17 (34.0%)

11 (40.7%)

6 (26.1%)

 Grade V

14 (28.0%)

8 (29.6%)

6 (26.1%)