Publication:
True dural spinal epidural cysts: report of 5 cases

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Date
2020-03
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Authors
Paredes, Igor ; Munarriz, Pablo M. ; Toldos, Óscar ; Castaño León, Ana María ; Panero, Irene ; Eiriz, Carla ; García Pérez, Daniel ; Pérez Núñez, Ángel ; Lagares, Alfonso ; Alen, José Antonio F.
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Facultades de la UMU::Facultad de Medicina
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Publisher
Elsevier
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Farmacología
DOI
https://doi.org/10.1016/j.wneu.2019.12.010
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info:eu-repo/semantics/article
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Abstract
Background Spinal arachnoid cysts are a rare cause of compressive myelopathy. Spinal extradural arachnoid cysts (SEACs) are even rarer. Methods We retrospectively reviewed the SEACs operated on in our hospital between 2015 and 2019, according to their clinical and radiologic findings, treatments performed, and outcomes. Results We identified 5 cases (2 males and 3 females), ranging in age from 21 months to 78 years. Except for the pediatric case, all patients presented with pain and 3 had some grade of neurologic impairment. Preoperative magnetic resonance imaging showed multiloculated cyst in 4 cases, and the communication with the dura was properly identified in only 1 case. The patients were operated through a laminectomy or laminoplasty and total removal of the cyst, and the communication with the dura was identified and repaired in all cases. In all cases, the defect was near the exit of a nerve root, and rootlets were seen through it, producing a ball-like valve mechanism. Histology of the cyst wall showed true dura in every case. One patient needed a reoperation for evacuation of a fluid collection (related to the dural sealant). Following Odom's criteria, 3 patients had an excellent outcome and 2 had a fair outcome. Conclusions Total excision of a symptomatic SEAC through either laminectomy or laminoplasty is a safe and effective treatment option. Although isolated repair of the dural communication without cyst removal may seem appealing, we have found it very difficult to identify the point of communication preoperatively.
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Dural communication , Dural tear , Extradural spinal arachnoid cyst , Trua dura cyst , Compressive myelopathy
Citation
World Neurosurgery, 2020, Vol. 135, pp. 87-95
URI
http://hdl.handle.net/10201/208181
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