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  • Author or Editor: Kiyotaka Nakamagoe x
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Kazuya Uemura, Takashi Yoshizawa, Akira Matsumura, Hiroyuki Asakawa, Kiyotaka Nakamagoe and Tadao Nose

✓ The case of a 30-year-old man with a spinal extradural meningeal cyst in the thoracolumbar region is reported. Operative findings revealed a dural defect that allowed communication between the extradural cyst cavity and the subarachnoid space. Application of the Valsalva maneuver made the cerebrospinal fluid flow into the cyst cavity; however, reverse flow did not occur. These findings indicate that a valvelike mechanism developed in the enlarging cyst. Surgical resection of the cyst wall and closure of the dural defect provided a favorable result.