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Figure 3: Preoperative images of a 14-month-old child demonstrating T2-weighted axial magnetic resonance imaging (a), T2-weighted coronal magnetic resonance imaging (b) and axial computed tomography (c and d) views of a large frontoparietal Barkovich Type 2a interhemispheric arachnoid cyst with agenesis of corpus callosum. He underwent right low pressure cystoperitoneal shunt. Postoperative day 1, axial computed tomography (e and f) showing catheter inside the cyst. Postoperative axial computed tomography at 18 months follow-up showing marked resolution of cyst volume and hydrocephalus

Figure 3: Preoperative images of a 14-month-old child demonstrating T2-weighted axial magnetic resonance imaging (a), T2-weighted coronal magnetic resonance imaging (b) and axial computed tomography (c and d) views of a large frontoparietal Barkovich Type 2a interhemispheric arachnoid cyst with agenesis of corpus callosum. He underwent right low pressure cystoperitoneal shunt. Postoperative day 1, axial computed tomography (e and f) showing catheter inside the cyst. Postoperative axial computed tomography at 18 months follow-up showing marked resolution of cyst volume and hydrocephalus