What is the condition caused by a sudden pull on the extended pronated forearm, often seen in young children?

Nursemaid's elbow, also known as radial head subluxation, occurs when there is a sudden pull on a child's extended arm, leading to the displacement of the radius and the ligament becoming trapped. This condition is most commonly seen in young children because their ligaments are more elastic, and their bones are still developing, making them more susceptible to this kind of injury. When a child experiences this type of injury, they often exhibit reluctance to use the affected arm and may hold it in a slightly flexed position close to their body.

The other options, while relevant to arm and shoulder injuries, do not match the specific mechanism and population associated with nursemaid's elbow. The common cold is unrelated to arm injuries, while a fractured wrist typically involves more forceful trauma and is not caused by a simple pull on an outstretched arm. Additionally, rotator cuff injuries usually occur in older individuals engaged in repetitive overhead activities, not in young children from a sudden tug. Thus, nursemaid's elbow specifically describes the scenario in question and is the most appropriate condition.