What is a term for a break in the bone where the bone comes through the skin?

A break in the bone where the bone penetrates through the skin is known as a compound fracture. This type of fracture is significant because it not only involves a break in the bone itself but also results in an open wound where the bone has pushed through the skin. This condition is more severe than other types of fractures due to the increased risk of infection and complications associated with the open wound.

In contrast, a simple fracture, often referred to as a closed fracture, does not break through the skin. A stress fracture is a small crack in the bone often caused by repetitive forces or overuse, and a greenstick fracture occurs when a bone bends and cracks on one side without breaking all the way through, common in children due to the flexibility of their bones. Given this context, a compound fracture distinctly characterizes a fracture where there is an associated wound, making it the correct answer.