A 23-year-old male presents with severe pain, swelling, and deformity of his right elbow after falling onto an outstretched hand. His arm is held in a slightly flexed and pronated position. What is the likely diagnosis and what is the next step?
This scenario is suggestive of a posterior elbow dislocation, which is the most common type of elbow dislocation and often results from a fall onto an outstretched hand. The patient should be given pain relief, and an X-ray should be obtained to confirm the dislocation and to rule out any associated fractures. If no fractures are present, the elbow should be reduced as soon as possible, ideally in a controlled setting under sedation or anesthesia.