[The comparison of glioblastoma and its surrounding edema by MRI of brain].

In the article authors consider reasons, leading to the formation of edema around the glioblastoma by analysis of perifocal edema size, glioblastoma size and necrosis zone correlation. According their data, the size of glioblastoma edema, revealed by MRI, varies widely. Practically, in third of patients the size of edema is less than the glioblastoma size, in third--their sizes are equal, in 40% the size of edema exceeds the size of glioblastoma. Relying on received data it is found out that the formation of edema around the glioblastoma is not the consequence of tumor compression on adjoining brain tissue and is determined by transmissivity of blood-brain barrier disturbance as the result of vasoactive substances secretion by blastoma.