Surgical approach | Lateral ventricle | 3. Ventricle | 4. Ventricle | Total |
Interhemispheric trans-callosal | 6 | 13 | - | 19 |
Transcortical | 11 | - | 2 | 13 |
Pteryonal | - | 2 | - | 2 |
Suboccipital Infratentorial | - | - | 3 | 3 |
Supravermian | - | - | 2 | 2 |
Stereotaxis | 1 | - | - | 1 |
Total | 18 | 15 | 7 | 40 |