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.
Examples of mammary whole-mounts from (a) a Wistar-Furth rat and (b) a Copenhagen rat, both 37 days after N-methyl-N-nitrosourea treatment. Note the striking differences between the glands, with multiple preneoplastic lesions present in the Wistar-Furth gland but only one putative lesion present in the Copenhagen gland, as indicated by the arrows. Bar = 1 mm.
