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.
Time to progression comparing patients with recurrent World Health Organization (WHO) grade II to those with initially diagnosed WHO grade III meningioma. The percentages accompanying the curves are annual actuarial results, from 1 to 5 years after study registration. Used with permission from NRG Oncology.
