Fig. 23From: The elbow: review of anatomy and common collateral ligament complex pathology using MRIPosterolateral rotatory instability, stage 1. Coronal FS PD-weighted MRI (a, b) and coronal T1-weighted MRI (c, d) showing an avulsion of the proximal lateral ulnar collateral ligament and retraction of the osseous fragment (white arrows). Bone marrow edema is seen in the capitellum (white arrowheads) and radial head (white asterisks)Back to article page