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.
The internal sphincter and anal mucosa (white arrow) normally show marked contrast enhancement (as shown on this axial T1-weighted image with fat-saturation) and higher signal on T2-weighted images. The external sphincter does not demonstrate the same amount of contrast enhancement
