MRI:
The 32-year-old male patient presented with acute headache attacks and a feeling of dizziness. MR imaging showed a colloid cyst on the roof of the third ventricle, which was obstructing the left foramen of Monro and thus led to an enlargement of the left lateral ventricle.
Navigation:
Due to the unilateral enlargement of the left ventricle, the access is created on the left. The burr hole is selected far frontal and far lateral in order to achieve a good overview of the roof of the third ventricle.
مركز جراحة المخ و الأعصاب جرايفسفالد 
