leptomeningeal fibrosis

lep·to·me·nin·ge·al fi·bro·sis

a fibrous reaction within the subarachnoid space; sometimes a sequel to infectious or chemical meningitis.
See also: adhesive arachnoiditis.
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Biopsies of the brain and meninges found leptomeningeal fibrosis with prominent arachnoid cap cells.
In some areas, the process appeared resolved with extensive leptomeningeal fibrosis. Ziehl-Nielsen and auramine rhodamine stains failed to demonstrate mycobacteria.