title: Malignant transformation of osteoblastoma.
abstract: A recurrent spinal tumor confidently diagnosed as osteoblastoma eventually terminated as a sclerosing osteoblastic which metastasised nine years after the onset of symptoms.
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae / Q000473:pathology; D008175:Lung Neoplasms / Q000556:secondary; D009362:Neoplasm Metastasis; D009364:Neoplasm Recurrence, Local; D010017:Osteoma, Osteoid / Q000473:pathology* / Q000628:therapy; D012516:Osteosarcoma / Q000473:pathology* / Q000628:therapy; D013125:Spinal Neoplasms / Q000473:pathology* / Q000628:therapy