osteochondral lesion of the capitellum humeri

The elbow:

review of anatomy and common collateral ligament complex pathology using MRI. A 33-year-old female gymnast with elbow pain and instability. Sagittal T2-weighted MRI (a), coronal T1-weighted MRI (b), and coronal FS PD-weighted MRI (c), demonstrating an osteochondral lesion in the posterior capitellum caused by posterolateral rotatory instability. The lesion is unstable, with fluid extending into the interface between the fragment and the parent bone (white arrows). Proximal partial disruption of the lateral ulnar collateral ligament (white arrowheads). Joint effusion (black asterisk)