PMC8053473_01
(a) Initial T2-weighted axial magnetic resonance imaging (MRI) scan showing an interhemispheric arachnoid cyst with partial agenesis of the corpus callosum. (b and c) Preoperative T1 sagittal and T2 axial MRI scan showing the enlarging cyst with partial agenesis of the corpus callosum and ventriculomegaly. (d-h) Intraoperative microscopic views. (d) View from a right interhemispheric approach showing the falx cerebri, cingulate gyrus, and upper surface of the cyst. (e and f) Fenestration of the upper surface of the cyst with a view of the pericallosal arteries. (g) After incising and draining the cyst, fenestration was performed in the ventricular system. (h) View of the lateral ventricle following fenestration into both the interhemispheric cistern and lateral ventricle with dilation of the cyst wall. (i) Follow-up T1 sagittal MRI scan 5 months after the microscopic fenestration showing a successful surgical decompression with a decrease in the cyst and ventricle size.
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F1
MRI study, with associated ventriculomegaly [Figure 1a-c]. Through a right frontal craniotomy, the arachnoid cyst was incised and fenestrated into both the interhemispheric cistern and lateral ventricle [Figure 1d-h and Video 1]. A follow-up MRI scan 5 months after the surgery demonstrated successful surgical decompression with a decrease in cyst and ventricle size [Figure 1i].