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Search: Organ site Search: Tumor / Syndrome
WHO Classification of Tumours
Osteoblastoma, NOS
Nasal cavity and Sinuses


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.