PMC4766808_01
(a) Axial T2-weighted magnetic resonance imaging demonstrating multiple confluent cystic lesions in the basal cisterns and sylvian fissures. (b) Fluid-attenuated inversion recovery magnetic resonance imaging showing multiple cystic lesions with the largest cyst measuring 21 mm in maximal diameter (dashed arrow) and mild mass effect on the brainstem. (c) Sagittal T1-weighted magnetic resonance imaging postgadolinium administration showing hydrocephalus and cystic lesions in suprasellar, prepontine, and foramen magnum cisterns. (d) Fluid-attenuated inversion recovery magnetic resonance imaging demonstrating multiple cystic lesions within the lateral ventricles bilaterally (arrows) with enlarged ventricles and transependymal flow
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F1
Subsequent magnetic resonance imaging (MRI) was performed which demonstrated the presence of too numerous to count nonenhancing, T2-hyperintense cystic lesions in the lateral ventricles and subarachnoid spaces including the bilateral sylvian fissures and cerebellopontine angles, as well as the suprasellar, interpeduncular, and prepontine cisterns with the largest cyst measuring 21 mm in diameter and exerting mild mass effect upon the brainstem [Figure 1].
(a) Axial T2-weighted magnetic resonance imaging showing cyst resolution within the basal cisterns and sylvian fissures. (b) Fluid-attenuated inversion recovery magnetic resonance imaging showing resolution of the multiple cystic lesions within the lateral ventricles and hydrocephalus
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F2
MRI scan performed at that time revealed complete radiographic resolution of his subarachnoid, spinal, and intraventricular cystic lesions with very mild persistent meningeal enhancement [Figure 2].