Ruptur des gemeinsamen Ursprung der Extensoren am Ellenbogen

The elbow:

review of anatomy and common collateral ligament complex pathology using MRI. Posterolateral rotatory instability, stage 2. Coronal FS PD-weighted MRI showing a complete detachment of the proximal lateral ulnar collateral ligament, the proximal radial collateral ligament proper, and the common extensor tendon (white short arrow), with retraction of the lateral ulnar collateral ligament (white arrowhead) and common extensor tendon (long white arrow). Note the extravasation of the joint fluid through the tear (black asterisk)

The elbow:

review of anatomy and common collateral ligament complex pathology using MRI. Posterolateral rotatory instability, stage 3B. Coronal T1-weighted MRI (a) and coronal FS PD-weighted MRI (b) showing an acute proximal common avulsion of the lateral ulnar collateral ligament and radial collateral ligament (white arrows), an acute avulsion of the anterior bundle of the medial collateral ligament complex (white arrowheads), a radial head fracture (white asterisks), a partial tear of the proximal common extensor tendon (yellow arrows), and joint effusion