Source:http://linkedlifedata.com/resource/umls/id/C0003708
MSH: Acute or chronic inflammation of the arachnoid membrane of the meninges most often involving the spinal cord or base of the brain. This term generally refers to a persistent inflammatory process characterized by thickening of the ARACHNOID membrane and dural adhesions. Associated conditions include prior surgery, infections, trauma, SUBARACHNOID HEMORRHAGE, and chemical irritation. Clinical features vary with the site of inflammation, but include cranial neuropathies, radiculopathies, and myelopathies. (From Joynt, Clinical Neurology, 1997, Ch48, p25),NCI: A disorder characterized by inflammation of the arachnoid membrane and adjacent subarachnoid space.,NCI: Inflammation of the arachnoid membrane and adjacent subarachnoid space. (On-line Medical Dictionary)