What is the yin-yang sign?
The appearance of bidirectional blood flow on ultrasound doppler, in keeping with a pseudo/aneurysm. It is named after the symbol representing the chinese philosophers thoughts to describe how opposing forces are interconnected and interdependent.
Creatinine 120. For further delineation MRA chosen.
3.5cm pseudoaneurysm at the hilum of the right renal transplant, with the internal yin-yang sign on doppler ultrasound.
Renal artery pseudoanuerysm at the anastomosis site.