Abstract
ObjectivesTo investigate the clinical manifestation and surgical outcome of spinal osteoblastoma.MethodsFrom June 2006 to July 2011, 18 patients with spinal osteoblastoma treated surgically were analyzed retrospectively. There were 11 males and 7 females with an average age of 27.5 years（range, 16-38 years). The tumors were located at C5 in 7, C6 in 6, C7 in 3, C6-T1 1 in 1 and T11 in 1. Based on WBB classification, 16 were 1-3 or 10-12 and 2 were 4-9 and 1-3. 18 operations had been performed with en bloc resection. A posterior approach was used for 16 patients, and a combined posterior and anterior approach was used for 2 patients. Reconstruction using instrumentation and fusion was performed using spinal instrumentation in 13 patients. We used visual analogue scales (VAS) to evaluate the change of pain before and after the operation, and the McCormick System to assess functional status of the spine. Imaging test was used to review the stability and recurrence rate of spine cord, and the confluence of graft bones.ResultsAll cases were followed up for 24-80 months (average, 38.4 months). The average surgical time was 120.8 minutes (range, 80-220 minutes), with the average intraoperative blood loss of 520 ml (range, 300-1200 ml). During the follow-up period, the VAS grade reduced from 6.46±1.32 to 2.26±1.05 (P <0.05). 15 patients had neurological function improved and 3 remained no change which was evaluated by McCormick scale for spinal function status at final follow-up.ConclusionsSpinal osteoblastoma has its own specific radiographic features. There is some recurrence in simple curettage of tumor lesion. The thoroughly en bloc resection of tumor or spondylectomy, bone fusion and strong in Ter fixation are the key points for successful surgical treatment.
Highlights
Osteoblastoma has been known by several different names, including benign osteoblastoma, giant osteoid osteoma and osteogenic fibroma
Osteoblastoma is a rare form of bone tumor, which accounts for approximately 1% of all primary bone tumors and about 3% of benign bone tumors
If the results suggested possible involvement of the vertebral artery foramen by tumor, the patient was subjected to the examination of magnetic resonance angiography (MRA) to determine whether the vertebral artery was involved
Summary
Osteoblastoma has been known by several different names, including benign osteoblastoma, giant osteoid osteoma and osteogenic fibroma. Since these different designations are not very suitable for distinguishing the type of tumor itself, the name osteoblastoma is most commonly used and has become the generally accepted term [1]. Osteoblastoma is a generally benign or locally aggressive osteoblastic tumor that forms osteoid tissue and bone. Osteoblastoma is a rare form of bone tumor, which accounts for approximately 1% of all primary bone tumors and about 3% of benign bone tumors. Spinal lesions are usually present in the posterior elements and the vertebral arches. Based on previous literatures review, spinal osteoblastoma does not exhibit characteristic clinical manifestations and the symptoms are often neglected during the early stages of the disease, which delays an accurate diagnosis and treatment [2,3,4,5,6,7,8,9]
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