Abnormality of the proximal humeral epiphysis Proximal humeral epiphysiolysis 2025-10-05T16:01:13Z Proximal humeral epiphysiolysis (Little League shoulder) is a shear or stress injury of the epiphyseal cartilage of the proximal humerus. Anteroposterior (AP) view of the shoulder in external rotation showing widening of the proximal humerus physis in comparison to contralateral shoulder with possible metaphyseal bony irregularity. Little league shoulder