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Osteoblastoma
Definition 1
A rare benign bone-forming neoplasm usually arising from the spine. It is a well-circumscribed lytic tumor that varies in size. The tumor is composed of woven bone trabeculae and shares similar histologic characteristics with the osteoid osteoma. Surgical curettage is the treatment of choice. The prognosis is excellent. (NCI Thesaurus)
Definition 2
A benign neoplasm of bone, characterized by the formation of osteoid tissue and large osteoblast-like cells. (NCI Thesaurus/CDISC)
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