Abstract: The paper studies the human brain astrocytomas by means of CT scanning and transmissioneleCtron microscope (TEM). The results present that the origination and development of the astrocytomas are multicentric, not single-centric. Clinically, some astrocytomas in the functional regionsdestroy the brain tissues extensively, but corresponding signs are not accopanied. The article suggests that Among astrocytotma cells do exist the intaCt nervous cells and a-cons which result in thedivorce between the above--mentioned damaging fields and corresponding sign.