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No Shinkei Geka. 1999 May;27(5):475-80.

[Endodermal cyst of the cerebellopontine angle cistern: case report].

[Article in Japanese]

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Department of Neurosurgery, Saga Medical School, Japan.


We report a case of a 55-year-old man with endodermal cyst located in the cerebellopontine angle cistern. The patient presented with dizziness. Magnetic resonance imaging (MRI) revealed multilocular cystic lesion at the right cerebellopontine angle. T1-weighted image showed a mass with a low signal intensity, but higher intensity than CSF. Gd-DTPA T1-weighted image showed no enhancement in the mass. Diffusion-weighted image showed a mass with no signal lesion. After successful surgical removal, it was found to be an endodermal cyst. These cysts have usually been found in the spinal canal, and their intracranial occurrence is exceptional. The unusual location of the cyst and its histological features and radiological findings are discussed.

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