Table 1 Demographic Characteristics and Meningioma Information

Patient age (y)*

69 ± 12 (40 ~ 98)

64 ± 10 (43 ~ 83)

< 0.001

No. of men

No. of women

27 (27)

73 (73)

15 (24.2)

47 (75.8)

0.57

Follow up period (y)*

2.9 ± 2.5

3.0 ± 2.3

0.87

Post treatment period (y)*

2.6 ± 2.2

0.38

Total radiation dose†

0

1400 (400–2800)

Location (No.) (%)

< 0.0001

Parasagittal or falx cerebri

76 (76)

32 (51.6)

Anterior cranial fossa

6 (6)

2 (3.2)

Cerebellopontine angle

3 (3)

9 (14.5)

Cerebellar tentorium

3 (3)

1 (1.6)

Cavernous sinus

2 (2)

3 (4.8)

Posterior fossa

2 (2)

6 (9.7)

Olfactory bulb

2 (2)

3 (4.8)

Lateral ventricle

2 (2)

2 (3.2)

Middle cranial fossa

2 (2)

1 (1.6)

Prepontine cistern

1 (1)

0 (0)

Foramen magnum

1 (1)

0 (0)

Sella

0 (0)

1 (1.6)

Straight sinus

0 (0)

1 (1.6)

Optic sheath

0 (0)

1 (1.6)

Imaging features (No.) (%)

Description

CSF cleft

Perimeter of CSF between the tumor and brain

88 (88)

47 (75.2)

< 0.001

Mass effect

Shift in normal brain parenchyma due to tumor

25 (25)

23 (36.8)

0.02

Intratumoral heterogeneity

Heterogeneity in hyperintensity of MRI signal throughout tumor

22 (11)

7 (11.2)

0.87

Skull hyperostosis

Bony overgrowth adjacent to tumor

14 (14)

14 (22.4)

0.07

Multifocality

Non-contiguous growth of tumor

5 (5)

3 (4.8)

0.95

Bony invasion

Appearance of tumor invading the skull

3 (3)

12 (19.2)

< 0.0001

Midline shift

Shift of the brain past midline

3 (3)

3 (4.8)

0.26

Necrosis/Hemorrhage

Presence of necrosis or hemorrhage

3 (3)

5 (8.0)

0.04

Spiculation

Irregularities in tumor shape and border

3 (3)

3 (4.8)

0.39

Cystic component

Fluid filled cysts within the tumor

3 (3)

2 (3.2)

0.76

Sinus invasion

Presence of venous sinus invasion

2 (2)

10 (16)

< 0.0001

Recurrence

Recurrent at presentation

1 (1)

4 (6.4)

0.01