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.
Figure 1 Representative immunohistochemical staining of cyclo‐oxygenase‐2 (COX‐2) in node‐negative breast cancers: breast carcinoma completely lacking COX‐2 protein expression (left). Specific cytoplasmatic COX‐2 expression (right). The complete lack of immunostaining in an adjacent normal breast duct (asterisk) is seen. Inset: strong COX‐2 expression in a colorectal carcinoma serving as positive control. Original magnification ×400.
