The brain gliomas, for it s abnormal structure and function of blood vessels ,result in the insufficient blood supply to them. These malignant tumors consume a large quantity of oxygen because growing and metabolizing quickly.

• 脑胶质瘤由于血管结构和功能的异常，导致肿瘤血供减少，加上肿瘤生长迅速，代谢快，耗氧量大，因此肿瘤常处于缺氧状态，乏氧程度越高，恶性程度越重。