Table 3 Comparison of optic nerve sheath diameter related parameters, midline shift, and hemorrhagic patterns on postprocedure and D1 CT images according to early and late malignant progression

CT_{postprocedure}

Early malignant progressors

(n = 12)

Nonprogressors

(n = 46)

P-value

CT_baseline to malignant progression, hr

10.8 ± 7.4

Δ time (CT_{Postprocedure}-CT_baseline), hr

3.9 ± 1.2

4.2 ± 3.2

0.716

ONSD (mm)

5.92 ± 0.56

5.81 ± 0.71

0.599

ONSD/ETD ratio, %

26.24 ± 1.99

25.45 ± 2.9

0.382

Δ ONSD/ETD ratio, %

3.70 ± 2.78

1.89 ± 3.37

0.093

MLS (mm)

6.08 ± 4.82

1.69 ± 2.21

0.009

Hemorrhagic pattern

< 0.001

No hemorrhage

0 (0.0%)

14 (30.4%)

HI 1

0 (0.0%)

10 (21.7%)

HI 2

1 (8.3%)

12 (26.1%)

PH 1

4 (33.3%)

4 (8.7%)

PH 2

7 (58.3%)

6 (13.0%)

CT_D1

Late malignant progressors

(n = 7)

Nonprogressors

(n = 39)

P-value

CT_baseline to malignant progression, hr

52.6 ± 51.5

Δ time (CT_D1-CT_baseline), hr

20.0 ± 11.3

27.4 ± 11.9

0.136

ONSD (mm)

6.10 ± 0.36

5.67 ± 0.74

0.138

ONSD/ETD ratio, %

26.93 ± 2.64

24.83 ± 2.94

0.085

Δ ONSD/ETD ratio, %

3.60 ± 2.67%

1.05 ± 2.69

0.025

MLS (mm)

6.55 ± 2.87

3.64 ± 3.68

0.054

Hemorrhagic pattern

0.819

No hemorrhage

3 (42.9%)

22 (56.4%)

HI 1

1 (14.3%)

7 (17.9%)

HI 2

1 (14.3%)

4 (10.3%)

PH 1

2 (28.6%)

6 (15.4%)

PH 2

0 (0.0%)

0 (0.0%)