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Case Report
Korean J Spine 2005;2(2): 172-175.
16
Extradural Arachnoid Cyst in the Thoracic Spine - A Case Report -
Jae-Sung Bae, M.D., Jae-Young Choi, M.D., Se-Hun Kim, M.D.1, Kyeong-Hoon Sung, M.D.
Department of Neurosurgery, 21st Century Hospital, Seoul, Korea, Department of Neuropathology, Yonsei University College of Medicine, Seoul, Korea1
흉추에 생긴 경막외지주막 낭종 - 증례 보고 -
배재성,최재영,김세훈1,성경훈
21세기병원 신경외과, 연세대학교 의과대학 병리학교실1
Abstract
Spinal extradural arachnoid cysts are rare expanding lesions in the spinal canal. They usually present with progressive signs and symptoms caused by spinal cord compression if they enlarge. This report describes a patient with an extradural arachnoid cyst in the thoracic spine, and the possible pathogenesis, radiologic features, and the implications on surgical therapy are discussed.
The patient presented with progressive back pain radiating to both legs along the posterior thigh. Magnetic resonance imaging (MRI) revealed a thoracic extradural arachnoid cyst. Thoracic laminectomy was performed and a large, thin-walled cyst containing CSF was encountered. The walls of the cyst were easily dissected from the dura. The cyst was found to arise from a small neck protruding through a defect in the right lateral aspect of the dura. The neck was obliterated and the dura was repaired.
Postoperatively, the patient was neurologically normal without any deficits. MRI was helpful in diagnosing the lesion. Surgical removal is treatment of choice in patients with symptomatic extradural arachnoid cyst.
Keywords: Extradural arachnoid cyst.Magnetic resonance imaging (MRI).Thoracic spine
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