Index to Chiropractic Literature
Index to Chiropractic Literature
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ID 19620
  Title Arachnoid cyst: A case report
Journal eJ Acad Chiropr Orthoped. 2007 Jun;4(2):Online access only p. [11-14]
Peer Review Yes
Publication Type Case Report
Abstract/Notes Excerpt: Arachnoid cysts are benign congenital lesions arising from the cerebrospinal axis. They are associated with the arachnoid membrane, with no communication with the ventricular system. They typically contain cerebrospinal fluid. Rarely, arachnoid cysts arise in conjunction with neoplasms or adhesions following infection, hemorrhage, or surgery. They account for about 1% of intracranial masses, with 50-60% occurring in the middle cranial fossa and may also occur in the spinal canal. Spinal arachnoid cysts are classically located dorsal to the thoracic cord.

Arachnoid cysts are often an incidental finding on imaging studies. Patients are usually either asymptomatic or minimally symptomatic, despite the often impressive size of the lesion. The most common associated clinical features are headache, focal cranial prominence or seizures. Treatment of arachnoid cysts must be based upon the clinical findings and is somewhat controversial. Some believe that even asymptomatic patients should be treated aggressively, with decompression to avoid potential future complications. The most effective surgical treatment seems to be excision of the outer cyst membrane and shunting to the peritoneal cavity. Others advocate a more conservative approach with asymptomatic or minimally symptomatic cysts, as in this case. Serial MRI is appropriate in these cases to rule out rapidly enlarging cysts, which may indicate more aggressive management.

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