PMC8202361_01
Sagittal (a) Computed tomography scan demonstrating dilation of all ventricles. Sagittal (b and d) T1-weighted, sagittal (c) T2-weighted magnetic resonance imaging showing dilation of all ventricles, Chiari malformation type I, obliteration of the retrocerebellar cerebrospinal fluid space, and syringomyelia
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F1
Cerebral computed tomography scan revealed hydrocephalus with significant dilatation of all ventricles, including the fourth ventricle, and obliteration of the retrocerebellar space of the cerebrospinal fluid (CSF) [Figure 1a]. Complementary craniocervical magnetic resonance imaging (MRI) confirmed tetraventricular hydrocephalus and showed CM-I and cervical syringomyelia extending to C3 [Figure 1b and c]. The interpeduncular and prepontine cisterns were significantly compressed and reduced in volume by the very large dilatation of the fourth ventricle [Figure 1].
Sagittal (a) T1-weighted and Sagittal (b) T2-weighted postoperative magnetic resonance images showing complete disappearance of Chiari malformation type I and Syringomyelia with a resolution of hydrocephalus
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F2
The control MRI at 8 months postoperatively showed a virtual disappearance of syringomyelia, the ascension of the cerebellar tonsils, and the resolution of hydrocephalus [Figure 2].