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  • Title: Endodermal epithelial cyst in the prepontine cistern extending into the fourth ventricle--case report.
    Author: Hirai O, Kondo A, Kusaka H.
    Journal: Neurol Med Chir (Tokyo); 1991 May; 31(5):283-6. PubMed ID: 1717864.
    Abstract:
    The authors report a case of epithelial cyst, which recurred 32 years after the initial surgical treatment. Computed tomography showed no abnormality, but magnetic resonance (MR) imaging clearly demonstrated a well-demarcated mass in the prepontine cistern, extending into the fourth ventricle. The lesion showed extreme hyperintensity compared with the surrounding brain on both the T1- and T2-weighted images. The ultrastructural features of the cyst suggested an endodermal origin. MR imaging and electron microscopy are essential for correct diagnosis and exact pathogenetic identification of intracranial cystic lesions.
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