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Imaging analysis of chordoma in craniocervical junction and mobile spine |
ZHANG Li-hua, YUAN Hui-shu |
Department of Radiology, Peking University Third Hospital, Beijing 100191, China |
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Abstract Objective: To characterize the imaging spectrum of chordoma in the junction of craniocervical spine and mobile spine, so that to improve the understanding of chordoma. Methods: Fifty-five patients pathologically diagnosed with chordoma were reviewed and the following radiologic findings were evaluated including location, type of bone destruction, paraspinal and intraspinal invasion. Imaging appearances were summarized and compared with pathology results. Results: Cervical spine, the junction of cranial and lumbar spine was involved accounting for 76%, 16% and 7% respectively. Forty-six tumors were intraosseous, five cases were intraspinal and four cases were in the perivetebral space. Bone destruction was seen in vertebral body(45%), both vertebral body and posterior attachement(27%), clivus basilaris and C1(16%), and posterior attachement(2%). Thirty-two cases showed bone destruction and osteosclerosis and 5 cases showed no bone destruction. Chordomas tended to extend multilevel segments(62%) and invaded paraspinal and intraspinal space(87%) with enlargement of intervertebral foramen(22%) and showed dumb-bell shape(11%). Typital chordoma was commonly seen accounting for 95% and the rest(5%) was undifferentied and chondroid. Conclusions: Chordoma of mobile spine is commonly seen in the cervical spine and it often involves several spinal segments. Vertebral chordoma shows lytic bone destruction with bone sclerosis and it can invade paraspinal and intraspinal region and very few cases may be in the intraspinal and paraspinal region with foramen enlargement. Dumb-belled chordoma and chordoma without bone destruction are less commonly seen.
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Received: 20 March 2017
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