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Journal of Korean Neurosurgical Society 2005;37(4): 310-312. |
| Endodermal Cyst of the Posterior Fossa. |
| Chul Woo Lee, Seok Mann Yoon, Yoon Jung Kim, Il Gyu Yun |
1Department of Neurosurgery, Soonchunhyang University, Cheonan Hospital, Cheonan, Korea. smyoon@schch.co.kr
2Department of Pathology, Soonchunhyang University, Cheonan Hospital, Cheonan, Korea. |
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| ABSTRACT |
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We report a case of endodermal cyst of the posterior fossa.
A 44-year-old man presented with headache for three months.
Computed tomography and magnetic resonance imaging revealed a 6x2.5x2cm sized extra-axial non-enhancing cystic lesion on the ventral aspect to brain stem. To avoid retraction injury to brain stem, far lateral transcondylar approach was selected. Right suboccipital craniotomy and partial removal of occipital condyle with resection of C-1 and C-2 hemilaminae exposed the extra-axial cyst well. The cyst has a whitish thick membrane. It was not adherent to brain stem and lower cranial nerves. Total removal of the cyst was done without difficulty. Histological analysis disclosed a layer of pseudostratified columnar epithelium with basement membrane. The result of immunohistochemical study was consistent with endodermal cyst. |
| Key Words:
Endodermal cyst; Posterior fossa; Far lateral transcondylar approach |
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