medial epicondylar apophysis

The elbow:

review of anatomy and common collateral ligament complex pathology using MRI. A 12-year-old left-handed baseball pitcher with medial epicondyle pain. Axial T1-weighted MRI (a), axial FS PD-weighted MRI (b), coronal FS PD-weighted MRI (c), and coronal T1-weighted MRI (d) showing a widening of the medial epicondylar physis (white arrows) and bone marrow edema (white asterisks)