case_images: PMC7294172_01
case_images: Preoperative axial noncontrast computed tomography image shows a heterogeneous intraventricular mass predominantly isodense to grey matter, with a right posterior hypodense component. There is left greater than right lateral ventricular hydrocephalus.
case_images: SNI-11-138-g001.jpg
case_images: PMC7294172_01_SNI-11-138-g001.jpg
case_images: F1
case_images: A computed tomography (CT) scan identified a mixed density 6.0 cm intraventricular mass with dilatation of the left lateral ventricle and a 1.4 cm rightward bowing of the intraventricular septum [Figure 1].
case_images: (a) Axial T2-weighted magnetic resonance imaging (MRI) shows a heterogeneous intraventricular lesion containing T2-hypointense components anteriorly and a cystic component at the right posterior aspect. Postcontrast axial (b), coronal (c) and sagittal (d) T1-weighted MRI sequences show a heterogeneously enhancing mass following intravenous contrast. The sagittal image also shows extension of the posterosuperior extent of the lesion in the undersurface of the posterior body of the corpus callosum.
case_images: SNI-11-138-g002.jpg
case_images: PMC7294172_01_SNI-11-138-g002.jpg
case_images: F2
case_images: The lesion was emanating from the roof of the left lateral ventricle from the region of the corpus callosum [Figure 2a-d].
case_images: Postoperative imaging. (a) Postcontrast axial T1-weighted image shows resolution of hydrocephalus with a small residual intraventricular enhancing mass consistent with sub-total resection. (b) Axial noncontrast head computed tomography scan shows postoperative pneumocephalus with residual tumor better seen on magnetic resonance imaging. A partially visualized shunt traversing the body of the left lateral ventricle is seen with resolution of previous hydrocephalus. (c) 6-month postcontrast axial T1-weighted image shows stable lesion with minimal enhancement.
case_images: SNI-11-138-g003.jpg
case_images: PMC7294172_01_SNI-11-138-g003.jpg
case_images: F3
case_images: Immediate postoperative noncontrast CT and T1 with contrast MRI showed sub-total resection (STR) of tumor with resolution of mass effect and no postoperative hydrocephalus [Figure 3a and b]. His 6-month postoperative MRI showed stable to slightly decreased size of residual tumor with minimal enhancement, markedly decreased from prior [Figure 3c].
case_images: Hyalinized vessels in glial component.
case_images: SNI-11-138-g004.jpg
case_images: PMC7294172_01_SNI-11-138-g004.jpg
case_images: F4
case_images: Vessels within the tumor were seen to be thickly hyalinized and there were focal piloid areas with eosinophilic granular bodies and Rosenthal fibers [Figures 4-6].
case_images: Vague neurocytic rosettes: ring-like arrangement of neurocytic tumor cells around eosinophilic core.
case_images: SNI-11-138-g005.jpg
case_images: PMC7294172_01_SNI-11-138-g005.jpg
case_images: F5
case_images: Vessels within the tumor were seen to be thickly hyalinized and there were focal piloid areas with eosinophilic granular bodies and Rosenthal fibers [Figures 4-6].
case_images: Rosenthal fibers.
case_images: SNI-11-138-g006.jpg
case_images: PMC7294172_01_SNI-11-138-g006.jpg
case_images: F6
case_images: Vessels within the tumor were seen to be thickly hyalinized and there were focal piloid areas with eosinophilic granular bodies and Rosenthal fibers [Figures 4-6].