Is deep brain involvement in intracranial primary central nervous system lymphoma of importance for penetration of chemotherapeutic agents?

In intracranial PCNSL, the only significant prognostic factor for OS and PFS in multivariate analysis was age and deep brain involvement. While contingent on a small study sample, we hypothesize this may in part be explained by regional differences in vascular supply and delivery from a dysfunctional perfusion signature.