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.
Mice expressing oncogenic K-ras develop esophageal squamous papillomas and lung adenomas. Shown are normal gastroesophageal junction from M+ mouse (×10) and esophageal squamous papilloma (×5), ear squamous papilloma (×2), and lung adenomas (×5; inset, ×40) from KM+ mice. Original magnifications in parentheses.
