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.
(A) Normal brain tissue. (B) High-cell-density tumor tissue. (C) Necrotic region. (D) Blood vessel hyperplasia. (E) Microvessel, as indicated by the arrow. (F) Active proliferation in the tumor. Arrows indicate cells in metaphase.
