Otherwise supported adequately, it invariably contributes to varus collapse with the fracture or screw penetration with the humeral head. A very well-positioned calcar screw, fibular strut graft or a small medial plate can reduce this complication. From time to time the deep muscles in the shoulder joint (rotator cuff muscles) https://www.theorthopaedicandpainpractice.com/what-is-a-proximal-humeral-fracture/