The purpose of this work was to study CSF dynamics and brain elasticit
y in patients with peritumoral BE. The investigations was carried out
in 14 patients with supratentorial meningiomas. The volume of tumor an
d the volume of BE was determined planimetrically on CT. CSF dynamics
were evaluated using constant-pressure infusion-drainage tests. A sign
ificant positive,correlation was observed between Ve and F. Definite i
ncreases in F in patients with high Ve may depend on the sum of the cl
earance of BE fluid and the amount of CSF produced. Increase in R corr
elates with the maximum values of Vt and Ve. This increase in R may de
pend on the compression of arachnoid villi by tumor and swollen brain.