A rare condition that is characterized by chronic inflammation and thickening of the arachnoid mater, which is the middle of the 3 meninges (the membranes that cover the brain and spinal cord).
n. an inflammatory process causing thickening and scarring (fibrosis) of the membranous linings (*meninges) of the spinal canal. The resulting entrapment of nerve roots may result in weakness, pain, and numbness in the affected area. The condition may result from infection or inflammation of the meninges, surgery, or as a response to the oil-based dyes previously used in *myelography. The reaction to myelography is prevented by the current use of water-soluble dyes.
The injection of a radio-opaque substance into the central canal of the SPINAL CORD in order to assist in the diagnosis of diseases of the spinal cord or spine using X-ray examination. Because of the high risk of causing damage to the spinal cord (arachnoiditis), it has been largely superceded by MRI.... myelography
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