An official website of the United States government Here's how you know

U.S. Department of Health and Human Services | National Institutes of Health

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.

Papillary Hyperplasia

The Digitized Atlas of Mouse Liver Lesions

Much of the work carried out by DTT is in support of the National Toxicology Program (NTP), an interagency partnership of the Food and Drug Administration, National Institute for Occupational Safety and Health, and NIEHS.

Visit the NTP Website

Papillary hyperplasia of the gallbladder with a small mucosal ulcer (arrow).