Radiology Teaching Files > Case 46894

never visited ARACHNOID CYST
Contributed by: LSUHSC-SHREVEPORT Radiology Department, Radiologist, Louisiana State University Health Sciences Center - Shreveport, Louisiana, USA.
Patient: 53 year old female
History: Patient presented with history of back pain.

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Diagnosis: Arachnoid Cyst

"The usual magnetic resonance imaging (MRI) appearance of an intradural spinal arachnoid cyst is a slightly increased signal of the cyst with some interspersing signal voids on T2-weighted images." (1)

Majority of spinal intradural arachnoid cysts are found posterior to the thoracic spinal cord. These cysts have also been reported in the cervical and lumbar areas. Pain, which may be diffuse, radicular, or local, is the main symptom. Other presenting symptoms include impaired motor function, gait problems, spastic quadriparesis, dysaesthesia, hypalgesia, and urinary hesitancy. Congenital spinal intradural arachnoid cysts are thought to develop as "embryonic malformations due to an error in the differentiation of early endomeningeal tissue." Acquired spinal arachnoid cysts are thought to be due to meningitis, trauma or hemorrhage. (2)


(1) Chen C, Wang L, Wong Y. The MRI Appearances of an Intradural Spinal Arachnoid Cyst Accompanying Transverse Myelitis. Chin J Radiol 2000;25(3):129-132.

(2) Bhatia S, et al. Craniospinal Intradural Arachnoid Cyst. Postgraduate Medical Journal (1992). 68, 829-830.

by Martin Pilat, MSIII / send comments to Radiology Department, 2003-03-02
Case reviewed by Juan R Rodriguez MD, Radiology resident at LSUHSC-Shreveport--LSUHSC-SHREVEPORT Radiology Department, 2003-04-11
Additional Details:

Case Number: 46894Last Updated: 04-11-2003
Anatomy: Spine and Peripheral Nervous System   Pathology: Benign Mass, Cyst
Modality: MRExam Date: 02-18-2003Access Level: Readable by all users
Keywords: arachnoid cyst

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