What is a key characteristic of glioblastoma multiforme?

Glioblastoma multiforme is known for its highly aggressive nature, which is a defining characteristic of this type of brain tumor. This malignancy typically displays rapid growth and a tendency to invade surrounding brain tissues, making it particularly difficult to treat effectively. The aggressive behavior is due to its complex cellular composition, which includes a mix of tumor cells with varied levels of differentiation, along with areas of necrosis and vascular proliferation. This aggressive growth and invasion are what often lead to poor prognoses in affected individuals.

The other options present traits that do not apply to glioblastoma multiforme. For instance, the tumor does not exhibit slow growth; rather, it is marked by rapid progression. Additionally, glioblastoma is not comprised of well-differentiated cells; instead, it consists of poorly differentiated cells that vary widely in their appearance and function. Lastly, glioblastoma is not localized; it often infiltrates other areas of the brain rather than remaining confined to a single area, which further emphasizes its aggressive nature.