If not supported adequately, it invariably contributes to varus collapse on the fracture or screw penetration from the humeral head. A effectively-positioned calcar screw, fibular strut graft or a small medial plate can avoid this complication. Often the deep muscles in the shoulder joint (rotator cuff muscles) can be wounded https://www.theorthopaedicandpainpractice.com/what-is-a-proximal-humeral-fracture/