What happens to an injured leg in case of a fractured extremity?

When a leg sustains a fracture, the typical presentation includes rotation and a noticeable shortening compared to the uninjured leg. This occurs due to muscle contractions around the fracture site, which can pull the bone ends out of alignment. As a result, the injured limb may not only appear shorter but can also have a characteristic outward or inward rotation, depending on the specific type of fracture and the position of the bone fragments.

The other options do not accurately reflect the common physical changes associated with a fractured extremity. For example, a fractured leg doesn't lengthen; it typically remains at the same length but may appear shorter due to displacement. Additionally, an increase in temperature is not a typical response to a fracture; rather, the area may show signs of swelling and bruising. Lastly, the assertion that the injured leg remains unaffected is incorrect, as a fracture inherently indicates damage and will impact the limb's function and appearance.