Which of the following is NOT considered a type of fracture?

A contusion is considered a muscle or soft tissue injury resulting from a blunt force, leading to bruising and swelling without any associated fracture. In contrast, fractures represent a break in the continuity of the bone structure.

Closed fractures involve a break in the bone without any disruption to the skin, while open fractures, also known as compound fractures, involve a break that extends through the skin and exposes the bone. Avulsion fractures occur when a fragment of bone is pulled off by a tendon or ligament, typically due to a forceful pull. Each of these types directly relates to bone integrity and fracture mechanisms, establishing them firmly as types of bone fractures, whereas a contusion does not fall into this category. Thus, recognizing a contusion as a soft tissue injury, rather than a fracture, is crucial in differentiating these terms in the context of injuries.