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American Journal of Neuroradiology 20:681-685 (4 1999)
© 1999 American Society of Neuroradiology

ARTICLE

Posterior Fossa Epithelial Cyst: Case Reportand Review of the Literature

Hani Elmadbouha, Shawn F. S. Halpin,a, Jim Neala, Richard H. Hatfielda and Margaret D. Hourihana

a From the Departments of Neuroradiology (H.E., S.F.S.H., M.D.H.), Neuropathology (J.N.), and Neurosurgery (R.H.H.), University Hospital of Wales, Heath Park, Cardiff.

Summary: A 49-year old woman with progressive cranial nerve signs and hemiparesis was found at MR imaging and at surgery to have a cyst at the foramen magnum. Immunohistochemistry and electron microscopy showed an epithelial cyst of endodermal origin. MR findings were of an extraaxial mass, with short T1 and T2 times. Unless immunohistochemistry and electron microscopy are used in the final diagnosis of such cysts, all posterior fossa cysts lined by a single layer of epithelium should be described simply as epithelial cysts.






Copyright © 2008 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X