A piece of bone and/or cartilage loosened from its attachment after trauma and a cause of a lesion.

A type of osteochondritis in which articular cartilage and associated bone becomes partially or totally detached to form joint loose bodies. Affects mainly the knee, ankle, and elbow joints.

Bone degeneration inside of a joint, causing small pieces of bone and cartilage to become detached.

A fragment of cartilage and subchondral bone that becomes detached, either partially or completely, from the bone underneath. Tends to occur on the convex surface of joints and in the knee.