This site is targeted at medical and radiology professionals, contains user contributed content, and material that may be confusing to a lay audience. Use of this site implies acceptance of our Terms of Use.

The yin-yang sign

Dr MT Niknejad and Dr Omar Bashir et al.

The yin-yang sign is a radiological sign described in both true and false aneurysms on various imaging modalities. 

Doppler sonography

Indicates bidirectional flow due to swirling of blood within the aneurysm or the pseudoaneurysm , which may resemble its namesake.

Contrast enhanced CT

The patent portion of the lumen of the aneurysmal vessel demonstrates increased attenuation, due to contrast enhancement whereas a part of the lumen shows reduced attenuation due to a mural thrombus.

See also

This article is a stub, which means it needs more content. You can contribute to Radiopaedia.org too. Just register and edit... every little bit helps.

Updating… Please wait.
Loadinganimation

 Details successfully updated.

Error Unable to process the form. Check for errors and try again.

 Thank you for updating your details.