Imaging Sign of the Day – Soft-tissue Rim Sign

Soft-tissue rim sign – helpful in distinguishing a ureteric stone from a phlebolith on CT imaging. Ureteric stones appear as a calcific density with a surrounding rim of soft tissue representing the oedematous ureteric wall (red arrow). Phleboliths on the other hand usually have imperceptible walls and therefore they appear to be surrounded by fat (green arrow). Occasionally phleboliths have a tail of remnant parent vein associated with one edge known as the comet-tail sign.

Soft tissue rim sign

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: