PMC6744829_01
Image of the primary tumor, an intraventricular atypical choroid plexus papilloma. T1-weighted sagittal image with contrast shows a homogeneously enhancing lesion in the inferior fourth ventricle (arrow).
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F1
However, a cranial magnetic resonance imaging (MRI) showed a tumor mass within the fourth ventricle (3 cm x 2 cm of size [Figures 1 and 2]); the differential diagnosis included an ependymoma, a plexus papilloma, and an intraventricular meningioma.
Image of the primary tumor, an intraventricular atypical choroid plexus papilloma. T1-weighted axial image with contrast shows a homogeneously enhancing lesion in the fourth ventricle with contact to and impression on the left middle cerebellar peduncle (arrow).
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PMC6744829_01_SNI-10-65-g002.jpg
F2
However, a cranial magnetic resonance imaging (MRI) showed a tumor mass within the fourth ventricle (3 cm x 2 cm of size [Figures 1 and 2]); the differential diagnosis included an ependymoma, a plexus papilloma, and an intraventricular meningioma.
Image of the recurrent atypical choroid plexus papilloma in the middle cerebellar peduncle. T1-weighted axial image with contrast shows an enhancing intraparenchymal lesion with surrounding edema (arrow).
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F3
In September 2017, a cranial MRI showed a localized, inhomogeneous contrast-enhancing tumor mass in the middle left cerebellar peduncle (circa 17 mm x 17 mm) [Figure 3].