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. 2020 Mar 2;36(8):1761–1766. doi: 10.1007/s00381-020-04532-7

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© The Author(s) 2020

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Fig. 2 — Case 7. a Non-contrast enhanced CT showing an isodense lesion centered in the fourth ventricle with moderate ventriculomegaly. b T2-weighted MR, axial image (left) and sagittal image (right) showing a severe compression on the left-sided floor of the IV ventricle and severe hyperintense changes in the dorsal brainstem and cerebellar peduncle by the IV ventricle tumor. c Contrast enhanced MRI, T1-weighted axial image (left) and sagittal image (right) showing a lobulated homogenously enhancing tumor centered in the IV ventricle. d Postoperative MRI brain; contrast enhanced T1-weighted axial image (left) and sagittal image (center) showing a resolution of IV ventricle tumor with a small residual enhancement on the floor of the IV ventricle, and resolution of brainstem edema on T2-weighted sagittal image (right)