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Updated: Jul 29, 2026

Intraoperative Ultrasound in Spinal Surgery
Published on: August 17, 2022
Spinal extradural meningeal cyst. Case report
K Uemura1, T Yoshizawa, A Matsumura
1Department of Neurosurgery, Institute of Clinical Medicine, University of Tsukuba, Ibaraki, Japan.
Abstract:
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.
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