(A) Anteroposterior plain radiograph of left shoulder at the time of initial diagnosis (age 17), showing a bulky bilobed symmetric osteocartilagenous overgrowth of the proximal humeral epiphysis with stippled calcifications, cortical thinning, and a sharp zone of transition towards the metaphysis. (B) Anteroposterior plain radiograph of the left shoulder revealing the bulky, bilobed, incongruent osteocartilagenous overgrowth of the proximal humeral epiphysis. The overgrowth was asymmetric with exuberant enlargement of the medial component, which presented osteolytic areas and areas of cortical breach. Rings and arcs, calcifications, and osteolytic foci were evident in the proximal metaphysis.