case_images: PMC5437786_01
case_images: Preoperative sagittal magnetic resonance imaging noting hyperintensity at outlet of ectopically placed fourth ventricular outlet
case_images: JPN-12-40-g001.jpg
case_images: PMC5437786_01_JPN-12-40-g001.jpg
case_images: F1
case_images: It was decided that a Chiari II decompression was warranted [Figure 1].
case_images: Operative image of the posterior fossa noting the fourth ventricular outlet. Note the dermoid located near the ectopic choroid plexus of the fourth ventricle
case_images: JPN-12-40-g002.jpg
case_images: PMC5437786_01_JPN-12-40-g002.jpg
case_images: F2
case_images: Deep to the choroid plexus, desquamated epithelium, and hair were observed [Figure 2].
case_images: Follow-up sagittal magnetic resonance imaging at 10 years of age showing no sign of posterior fossa dermoid
case_images: JPN-12-40-g003.jpg
case_images: PMC5437786_01_JPN-12-40-g003.jpg
case_images: F3
case_images: Follow-up scan at 10 years of age showed no signs of posterior fossa dermoid [Figure 3].