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Natural History of Untreated OsteoblastomaA Case Report
Mohamed E. Elhawi, BS1; Gustavo L. De La Roza, MD1; Timothy A. Damron, MD2
1 6805B Upstate University Hospital, Downtown Campus, 750 East Adams Street, Syracuse, NY 13210
2 Upstate Bone and Joint Center, Suite 100, 6620 Fly Road, East Syracuse, NY 13057. E-mail address: Damront@upstate.edu
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Investigation performed at the Departments of Orthopedic Surgery and Pathology, Upstate Medical University, State University of New York, Syracuse, New York

Disclosure: None of the authors received payments or services, either directly or indirectly (i.e., via his or her institution), from a third party in support of any aspect of this work. None of the authors, or their institution(s), have had any financial relationship, in the thirty-six months prior to submission of this work, with any entity in the biomedical arena that could be perceived to influence or have the potential to influence what is written in this work. Also, no author has had any other relationships, or has engaged in any other activities, that could be perceived to influence or have the potential to influence what is written in this work. The complete Disclosures of Potential Conflicts of Interest submitted by authors are always provided with the online version of the article.

Copyright © 2013 by The Journal of Bone and Joint Surgery, Inc.
JBJS Case Connector, 2013 Nov 13;3(4):e110 1-7. doi: 10.2106/JBJS.CC.M.00130
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Osteoblastoma is a rare bone-forming tumor constituting about 1% of all bone tumors; it most frequently involves the spine in young patients1-3. Most osteoblastomas are active benign lesions, although they rarely may be characterized as being aggressive or even malignant4,5. Osteoblastomas are distinguished from the closely related osteoid osteoma, which has similar radiographic and histological appearances, predominantly by their size and behavior. Osteoid osteomas run a self-limited course, do not enlarge in size over time, eventually become indolent even when untreated, and are considered by some to be disappearing bone tumors; osteoblastomas are larger lesions that are also distinguished by their unique potential for enlargement1,6-8.
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