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) Biopsy of mucosal lesion, showing adenoma (right) and carcinoma (left). (Original magnification 40x) b) Immunohistochemistry for MLH1, performed on the endoscopic biopsy. The adenoma and the cancer both show loss of expression. Non-neoplastic crypts in the center of the field show the expected nuclear staining. (Original magnification 100x).
