PMC6118113_01
A 44-year-old male presented with complaints of hearing loss and gait instability. He was found to have a biopsy-proven pilocytic astrocytoma. Magnetic resonance imaging of the brain showed a mass in the right lateral ventricle. (a) Axial T2 sequence demonstrates heterogeneous mass (red arrow in A) within the anterior horn of the right lateral ventricle with associated mass effect and left-sided midline shift. (b) Axial T1 postcontrast images were obtained that demonstrated the intraventricular mass (red arrow in B) to have heterogeneous enhancement. (c) Coronal T1 postcontrast sequence demonstrates heterogeneous enhancement of the right intraventricular mass (red arrow in C) resulting in compression of the left lateral ventricle with mass effect.
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F1
A magnetic resonance imaging (MRI) of the brain with intravenous contrast demonstrated an enhancing intraventricular mass in the anterior horn of the right lateral ventricle [Figure 1].
Forty-four-year-old male status postresection of pilocytic astrocytoma with persistent hearing loss and gait instability. Superficial siderosis was shown on imaging. magnetic resonance imaging brain: Axial T2*gradient-recalled echo sequences of the brain at the level of midbrain (a) and at the level of the pons (b) show superficial siderosis. (a) Axial T2*gradient-recalled echo sequence at the level of the midbrain demonstrates susceptibility along the medial aspect of the temporal lobes bilaterally, specifically involving the hippocampus (blue arrow). (b) Axial T2*gradient-recalled echo sequence at the level of the cerebellum shows susceptibility along the vestibulocochlear nerve and facial nerve bilaterally, extending to the level of the internal acoustic meatus (blue arrow).
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F2
T2*GRE sequence at the level of the cerebellum also demonstrated susceptibility along the vestibulocochlear nerve and facial nerve bilaterally, extending to the level of the internal acoustic meatus [Figure 2]. The patient was lost to follow-up.