| obliterative arachnoiditis | Thickening of the leptomeninges, sometimes with obliteration of the subarachnoid space; commonly related to acute or chronic leptomeningitis of bacterial or chemical origin. See: leptomeningeal fibrosis. Synonym: obliterative arachnoiditis. (05 Mar 2000) |
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| adhesive arachnoiditis | Thickening of the leptomeninges, sometimes with obliteration of the subarachnoid space; commonly related to acute or chronic leptomeningitis of bacterial or chemical origin. See: leptomeningeal fibrosis. Synonym: obliterative arachnoiditis. (05 Mar 2000) |
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| arachnoiditis | <pathology> Inflammation of the arachnoid membrane and adjacent subarachnoid space. (27 Sep 1997) |
| neoplastic arachnoiditis | Infiltration of subarachnoid space by neoplastic cells, typically medulloblastoma or metastatic carcinoma. Synonym: neoplastic arachnoiditis. (05 Mar 2000) |