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.
Masses of amyloid interspersed between fragments of reactive brain tissue (hematoxylin & eosin [H&E], magnification ×200). Right insert shows involvement of blood vessel walls with amyloid (H&E, magnification ×300), while the left shows the characteristic apple-green birefringence (Congo red, polarized ×300)
