What are arachnoiditis?
Arachnoid-*a*t - **inflammatory process** in the membranes of the brain. The disease is characterized by deterioration of health, mental changes, and rare severe complications.
*Highlight:*
1) arachnoidal liquor cysts (cysts), communicating with the subarachnoid space during their expansion;
2) arachnoidendotheliomas, localized mainly in the hemispheres, cerebellum and corpus callosum.