The mass has a stong, irregular rim of enhancement with a nodule medially. The central necrotic portion does not enhance. There is surrounding hyperintensity respresenting edema and possibly non-enhancing tumor extension. Glioblastoma Multiforme is the most common and most malignant primary intracranial tumor. It is a type of astrocytoma.
Necrosis is the hallmark.
Hemorrhage, edema and mass effect are common. Histologic appearance is highly variable. Usually located in deep cerebral white matter, especially frontal and temporal lobes. They commonly cross the corpus callosum. CNS extension is common including satellite lesions, ependymal and pial extension and subarachnoid and CSF seeding.