Table 3 Relation between angioarchitecture characters and nidus obliteration among the studied cases

Size

   < 3 cm

0

1 (16.7)

4 (44.4)

MC = 15.38

  From 3to 6 cm

0

5(83.3)

0

P = 0.004*

   > 6 cm

2 (100)

0

5 (55.6)

Feeders

 Terminal perforator

2 (100)

6 (100)

8 (88.9)

MC = 0.944

 En passage

0

0

1 (11.1)

P = 0.624

Number of draining veins

 Single

0

0

3 (33.3)

MC = 3.24

 Multiple

2 (100)

6 (100)

6 (66.7)

P = 0.198

Venous drainage

 Superficial

1 (50)

0

0

 Deep

0

6 (100)

5 (55.6)

MC = 12.81

 Mixed

1 (50)

0

4 (44.4)

P = 0.012*

Aneurysm

  −ve

1 (50)

3 (50)

8 (88.9)

MC = 3.09

   + ve

1 (50)

3 (50)

1 (11.1)

P = 0.214

Fistulous

 Plexiform

2(100)

6(100)

7(77.8)

MC = 2.02

 Mixed

0

0

2(22.2)

p = 0.365

Borders

 Diffuse

2 (100)

2 (100)

3 (33.3)

MC = 3.24

 Compact

0

4 (66.7)

6 (66.7)

P = 0.198

Venous ectasia

 No

1 (50)

3 (50)

7 (77.8)

MC = 1.43

 Yes

1 (50)

3 (50)

2 (22.2)

P = 0.489

Non-ruptured

1 (50)

1 (16.7)

6 (66.7)

MC = 3.62

Ruptured

1 (50)

5 (83.3)

3 (33.3)

P = 0.164

Spetzler and Martin

 2

0

0

5 (55.6)

 3

0

3 (50)

2 (22.2)

MC = 8.64

 4

2 (100)

3 (50)

2 (22.2)

P = 0.07

Eloquence

 Non-eloquent

1 (50)

1 (16.7)

5 (55.6)

MC = 2.32

 Eloquent

1 (50)

5 (83.3)

4 (44.4)

P = 0.313

Location

 Occipital

0

1 (16.7)

3 (33.3)

 Cerebellar

1 (50)

2 (33.3)

0

MC = 12.83

 Brain stem

0

1 (16.7)

0

P = 0.382

 Occipito-parietal

1 (50)

0

2 (22.2)

 Occipito-temporal

0

1 (16.7)

2 (22.2)

 Brainstem + cerebellar

0

1 (16.7)

0

 Pericallosal

0

0

2 (22.2)

Feeding artery

 SCA

1 (50)

2 (33.3)

0

 PCA

1 (50)

2 (33.3)

7 (77.8)

MC = 10.29

 Basilar

0

1 (16.7)

0

P = 0.245

 PICA

0

1 (16.7)

0

 Pericallosal, PCA

0

0

2 (22.2)