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Causes of Arachnoiditis
Inflammation of the arachnoid can lead to the formation of scar tissue and can cause the spinal nerves to stick together and malfunction. The arachnoid can become inflamed because of an irritation from one of the following sources:
Making the Diagnosis
Diagnosing arachnoiditis can be difficult, but tests such as the CAT scan (computerized axial tomography) or MRI (magnetic resonance imaging) have helped with diagnosis. A test called an electromyogram (EMG) can assess the severity of the ongoing damage to affected nerve roots by using electrical impulses to check nerve function.
Note: Myelograms with the radiographic contrast currently in use, combined with CAT scanning, are not considered to be responsible for causing arachnoiditis or causing it to worsen.
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