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KMID : 1001920200630030342
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Journal of Korean Neurosurgical Society
2020 Volume.63 No. 3 p.342 ~ p.345
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Enlargement of Extraspinal Cysts in Spinal Dysraphism : A Reason for Early Untethering
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Kim Kyung-Hyun
Wang Kyu-Chang
Lee Ji-Yeoun
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Abstract
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Some types of spinal dysraphism can be accompanied by extraspinal cysts, including myelomeningocele, myelocystocele, myelocele, meningocele, limited dorsal myeloschisis, lipomyelomeningocele, and terminal myelocystocele. Each disease is classified according to the developmental mechanism, embryologic process, site of occurrence, or internal structure of the extraspinal cyst. In most cystic spinal dysraphisms except meningocele, part of the spinal cord is attached to the cyst dome. Most open spinal dysraphisms pose a risk of infection and require urgent surgical intervention, but when the cyst is accompanied by closed spinal dysraphism, the timing of surgery may vary. However, if the extraspinal cyst grows, it aggravates tethering by pulling the tip of the cord, which is attached to the dome of the cyst. This causes neurological deficits, so urgent surgery is required to release the tethered cord.
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KEYWORD
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Extraspinal cyst, Spinal dysraphism, Untethering, Intraoperative neurophysiologic monitoring, Tethered cord
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