The tumor is a mixed-density lesion with poorly defined borders, in which there is mostly high density due to intratumoral hemorrhage, but less calcification. Intratumoral necrosis and cystic lesions are hypodense, and their morphology is polymorphic. Most of the brain edema around the lesions is heavy, and there is no obvious border between the tumor and brain tissue. The ventricles are often compressed, deformed or closed, and the midline structures are often shifted to the opposite side. Ninety-five percent of tumors show heterogeneous enhancement after enhancement, which often appears as a central low-density necrotic or cystic area surrounded by proliferating vascular areas with irregular ring, island or spiral shaped enhancement. The necrotic areas are often located within the tumor parenchyma and appear as hypodense areas with irregular borders.