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.
Histological and immunohistochemical tests. (A) Panoramic section (haematoxylin and eosin: ×0.6). (B) Irregular acanthosis, lymphocytic infiltration and amyloid deposits (haematoxylin and eosin: ×4). (C) Congo red stain of amyloid (×10). (D) Congo red stain showing characteristic apple-green birefringence (arrows) under polarized light (×60).
