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Updated: Nov 8, 2025

Minimally Invasive Thumb-sized Pterional Craniotomy for Surgical Clip Ligation of Unruptured Anterior Circulation Aneurysms
Published on: August 11, 2015
Interhemispheric arachnoid cyst
Abdulrahman Albakr1,2, Nicholas Sader1, Sanju Lama1,3,4
1Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Canada.
Background:
Interhemispheric arachnoid cysts are uncommon and typically associated with other midline neurodevelopmental disorders, such as complete or partial agenesis of the corpus callosum.
Case Description:
We report a case of a 27-year-old woman with worsening headache, memory deficit, and radiological progression of an interhemispheric arachnoid cyst. The treatment consisted of craniotomy for interhemispheric cyst fenestration into both the interhemispheric cistern and lateral ventricle. The postoperative course was unremarkable, with considerable clinical improvement and significant reduction in cyst size.
Conclusion:
We successfully treat a patient with an enlarging arachnoid cyst and associated progressive symptoms with microsurgical fenestration.
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