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  • Title: Microsurgical Resection of Radiation-Induced Cervical Spinal Intradural Extramedullary Meningioma: Dural Splitting Resection.
    Author: Nguyen VN, Khan NR, Arnautović KI.
    Journal: World Neurosurg; 2021 Nov; 155():94-95. PubMed ID: 34454072.
    Abstract:
    Spinal meningiomas constitute 10% of all meningiomas. They most commonly rise in the thoracic spine and are most common in middle aged women; symptoms include progressive myelopathy.1,2 Radiation induced/radiotherapy-associated cranial meningiomas are well described with aggressive behavior; however, radiation-induced spinal meningiomas are extremely rare in the literature.3-7 Our patient had a history of Hodgkin lymphoma treated with neck radiation, and thyroid cancer treated with radioactive iodine/thyroidectomy. He presented with neck pain and myelopathy from a large intradural, extramedullary tumor compressing the spinal cord (C3-C5). He had a prevertebral phlegmon that was resolved with antibiotics prior to surgery. Intraoperative neurophysiological electrodes were placed for somatosensory-evoked potential and motor-evoked potential monitoring. C3-C5 bilateral laminectomies were performed (Video 1); dura was incised over the tumor. Tumor attachments to the dura were coagulated and divided. The tumor was dissected microsurgically from the spinal cord and nerve roots. The dural layer involved by the tumor was split and resected from the uninvolved dura, achieving tumor resection. Postoperatively, the patient's myelopathy resolved. He has been followed for a 1 year now with mangetic resonance imaging scans of the cervical spine ± contrast every 6 months. To our knowledge, this is the first operative video describing resection of a spinal meningioma, which happens to be radiation-induced, using a dural splitting technique to achieve better resection and prevent tumor recurrence. The alternative treatment would be to leaving the inner layer of dura, coagulation, or excising both layers and performing duraplasty. Both alternative options, however, would increase the risk of recurrence and spinal fluid leak. Cervical spine meningiomas with spinal cord compression and myelopathy should be resected to prevent further neurological decline. Dural splitting can be utilized to achieve "radical" tumor resection to prevent recurrence, which is particularly important if the tumor is aggressive and recurrent, as is the case in radiation-induced/radiotherapy-associated meningiomas. Upon dural closure, we applied autologous fat tissue along with fibrin glue to avoid spinal fluid leak as we published earlier.8 The patient consented to the procedure and publication of his image.
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