Damage to choroid plexus would interfere with the production of CSF (cerebrospinal fluid).

Choroid Plexus

The choroid plexus.

Yes. There is a little bit of choroid plexus that is found in the area near the bottom half of the cerebellum.

Well, the theory right now is the majority of CFS is produced within the ventricles the choroid plexus produces by a combined process of diffusion, pinocytosis and active transfer of arterial blood and the rest is produced by modified ependymal cells of the choroid plexus.