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Asymptomatic Osseous Loose Body in the Cervical SpineA Case Report
Catherine Shin, MD1; Ali Nourbakhsh, MD1; Efe Ozkan, MD1; Kim J. Garges, MD1
1 Division of Spine Surgery, Department of Orthopaedic Surgery and Rehabilitation (C.S., A.N., and K.J.G.), and Department of Radiology (E.O.), University of Texas Medical Branch, 301 University Boulevard, Galveston, TX 77555-0165. E-mail address for K.J. Garges: kjgarges@utmb.edu
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Disclosure: The authors did not receive any outside funding or grants in support of their research for or preparation of this work. Neither they nor a member of their immediate families received payments or other benefits or a commitment or agreement to provide such benefits from a commercial entity. No commercial entity paid or directed, or agreed to pay or direct, any benefits to any research fund, foundation, division, center, clinical practice, or other charitable or nonprofit organization with which the authors, or a member of their immediate families, are affiliated or associated.
Investigation performed at the Division of Spine Surgery, Department of Orthopaedic Surgery and Rehabilitation, and the Department of Radiology, University of Texas Medical Branch, Galveston, Texas

The Journal of Bone and Joint Surgery, Incorporated
J Bone Joint Surg Am, 2007 Jul 01;89(7):1586-1588. doi: 10.2106/JBJS.G.00164
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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 proliferation1. The natural history of loose bodies in synovial joints is slow enlargement with deposition of additional surface layers. However, if the loose body becomes trapped and reattaches to the synovium, it is then generally reabsorbed. Neuropathic or degenerative joints with hyperemic or inflamed synovium are particularly prone to the development of loose bodies, but they also tend to rapidly reabsorb them2. Histological studies have generally demonstrated varying amounts of osseous, cartilaginous, and fibrous tissue with living and dead osteocytes, chondrocytes, osteoclasts, and osteoblasts found in the tissue layers. No blood supply nourishes these loose bodies; therefore, they derive sustenance from the synovial fluid alone3.
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    These activities have been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint sponsorship of the American Academy of Orthopaedic Surgeons and The Journal of Bone and Joint Surgery, Inc. The American Academy of Orthopaedic Surgeons is accredited by the ACCME to provide continuing medical education for physicians.
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