Loose bodies or osteochondral fragments are commonly found in human joints.They are presumed to arise from trauma joint disintegration (for example degenerative changes) or synovial proliferation.

• 在人类的关节中可以经常发现有游离体或骨块的存在，有研究表明创伤、关节退化，或者滑膜增生都可能导致增大。