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Figure 2: Preoperative magnetic resonance imaging images (a-f) of a 6-year-old child demonstrating T1-weighted axial (a and b) T2-weighted axial (c) T2-weighted sagittal (d) T2-weighted coronal (e and f) views of a large Barkovich Type 2a interhemispheric arachnoid cyst with agenesis of corpus callosum. He underwent endoscopic cystoventriculostomy with endoscopic third ventriculostomy. Postoperative axial computed tomography scan (g and h) revealed significantly decreased cyst volume. The patient had a right subdural collection on postoperative scan which was managed conservatively and he did not require subduroperitoneal shunt

Figure 2: Preoperative magnetic resonance imaging images (a-f) of a 6-year-old child demonstrating T1-weighted axial (a and b) T2-weighted axial (c) T2-weighted sagittal (d) T2-weighted coronal (e and f) views of a large Barkovich Type 2a interhemispheric arachnoid cyst with agenesis of corpus callosum. He underwent endoscopic cystoventriculostomy with endoscopic third ventriculostomy. Postoperative axial computed tomography scan (g and h) revealed significantly decreased cyst volume. The patient had a right subdural collection on postoperative scan which was managed conservatively and he did not require subduroperitoneal shunt