MRI scan; brain cancer (glioblastoma)

Magnetic resonance image (MRI) showing multicentre glioblastoma. This is a malignant form of astrocytoma histologically characterized by pleomorphism of cells, nuclear atypia, microhaemorrhage, and necrosis. They may arise in any region of the central nervous system, with a predilection for the cerebral hemispheres, basal ganglia, and commissural pathways. Clinical presentation most frequently occurs in the fifth or sixth decade of life with focal neurologic signs or seizures.