Brain Tumors The brain contains many anatomical spaces: the ventricles, cisterns, and the subependymal recess. There are suitable conditions for the brain there, because... there are no vessels that ensure the outflow of cell waste products - cerebrospinal fluid, the blood-brain barrier, etc. All this creates conditions for the accumulation of metabolic waste in these spaces. This is called "intracerebral tumors". It is believed that the intracerebral