Final answer:
An X-ray examination can reveal fractures such as a fractured left clavicle or right third metacarpal, subluxations such as that of the left sternoclavicular joint, or detect no abnormalities. The clavicle is often fractured from falls or impacts, while the sternoclavicular joint is strong and less likely to be dislocated.
Step-by-step explanation:
An X-ray examination reveals various types of skeletal injuries that can include fractures, dislocations, and other abnormalities. The clavicle, or collarbone, is one of the bones most susceptible to fracture, especially due to falls on an outstretched hand or direct impact to the shoulder. The sternoclavicular (SC) joint is resilient and rarely dislocated, meaning that an excessive force would more likely result in a fractured clavicle, rather than a subluxation of this joint. When the clavicle is fractured, muscle actions can cause the shoulder and the lateral fragment of the clavicle to move anteriorly and medially, leading to overriding of the bone fragments, but seldom compromising the blood vessels and nerves underneath due to this anterior displacement. Metacarpal fractures, specifically of the third metacarpal on the right, are also a concern and typically result from direct trauma to the hand. An X-ray would reveal such bone fractures and indicate the need for further medical intervention such as surgery or stabilization with hardware.