Use of Doppler ultrasonography to detect an elusive communication of a spinal extradural arachnoid cyst

作者：Kanetaka Masakazu; Sugita Shurei; Chikuda Hirotaka^*; Takeshita Katsushi; Ono Takashi; Oshima Yasushi; Kawaguchi Hiroshi; Nakamura Kozo

来源：Journal of Clinical Neuroscience, 2011, 18(6): 863-864.

DOI：10.1016/j.jocn.2010.10.013

• Doppler ultrasonography
• Extradural arachnoid cyst
• Meningeal cyst
• Spinal cord compression
• Spinal cyst
• Surgery

Spinal extradural arachnoid cysts are thought to be extradural arachnoid pouches that communicate with the intraspinal subarachnoid space through a small dural defect. The mainstay of current treatment is resection of the cyst wall followed by obliteration of the communicating pedicle. Despite it:; clinical importance, the communicating pedicle of the cyst is often elusive. The authors report a 57-year-old woman with an extradural arachnoid cyst with intractable back pain and progressive motor weakness. Preoperative imaging studies, including phase-contrast MRI, failed to identify the communicating pedicle. Intraoperative Doppler ultrasonography clearly demonstrated the pulsatile influx of cerebrospinal fluid into the cyst. A flap-like structure was also noted near the pedicle; this structure appeared to act as a one-way valve. Doppler ultrasonography may be a helpful adjunct for identifying the location of elusive communication in a spinal extradural arachnoid cyst.

• 出版日期2011-6