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| Evaluation of imaging appearances and differential diagnosis of spinal osteoid osteoma and osteoblastoma |
| ZHANG Li-hua, YUAN Hui-shu, JIANG Liang, LIU Xiao-guang |
| Peking University Third Hospital, Beijing 100190, China |
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Abstract Objective: To evaluate imaging characters of spinal osteoid osteoma and osteoblastoma and improve awareness of these tumors. Methods: Retrospectively analyze CT and MRI appearances of 40 patients with osteoid osteoma and osteoblastoma in spine confirmed by surgical operation and pathological diagnosis. All the patients were divided into two groups according to tumor diameter, and the comparation of imaging features was performed. Results: The diameter of tumors were less than 2 cm in 28 cases and 12 tumors were with diameter more than 2 cm. Twenty-six tumors were located in cervical spine, 5 in thoracic spine, 8 in lumbar spine and 1 in sacrum. Twenty-five tumors were located in vertebral accessory, 11 in vertebral body, 3 cases in lateral mass of C1 and 1 involved both vertebral body and accessory. Ossification of tumor nidus was seen in 35 tumors with 33 cases adjacent bone sclerosis and 30 sclerosis rim formation. Five cases were shown as lytic bone destruction. Fluid-fluid levels were seen in five cases. There was statistic difference in bone sclerosis and sclerosis rim between two groups. Conclusions: Spinal osteoid osteoma and osteoblastoma mainly were located in cervical spine and most of them in spinal face joints. Bone sclerosis and sclerosis rim made some sense in identifying these tumors. The diameter was one of diagnostic index.
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Received: 07 December 2017
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