Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Supratentorial pilocytic astrocytoma with solid enhancement and vasogenic oedema. a An axial T1-weighted image shows a well-circumscribed, hypointense cerebral mass (arrows). b An axial T2-weighted image shows a hyperintense mass. Note the vasogenic oedema around the mass (arrows). c The lesion exhibits low signal on diffusion-weighted imaging. Contrast-enhanced axial (d) and (e) T1-weighted images demonstrate inhomogeneous enhancement of the mass
