Uemura K, Yoshizawa T, Matsumura A, Asakawa H, Nakamagoe K, Nose T
Department of Neurosurgery, Institute of Clinical Medicine, University of Tsukuba, Ibaraki, Japan.
J Neurosurg. 1996 Aug;85(2):354-6. doi: 10.3171/jns.1996.85.2.0354.
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.
