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논문 기본 정보

자료유형
학술저널
저자정보
양일권 (카톨릭대학 의학부 방사선과학교실)
저널정보
대한영상의학회 대한방사선의학회지 대한방사선의학회지 제25권 제1호
발행연도
1989.1
수록면
37 - 46 (10page)

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초록· 키워드

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thirty cases showing hard discs were collected from 206 consecutive cases of posterior disk herniation during the past one and a half years period. According to the shape of hard disc and the presence of marginal bone defect(MBD) of vertebral end plate 30 cases could be categori-zed into 4 distinct groups. They were small hard disc with focal MBD (group 1) lage hard disc with broad based MBD(group2) hard disc seperated from vertebral body without MBD (group 3) and hard disc fused with vertebral body without MBD(group 4), There were 14 patients in group1. In all but one case the hard discs and MBDs were located at the patamedial aspect of the posterior margin of the end plate. Ten(76.9%) of these had Schmorl's nodes and these were considered to represent an avulsion from the weakened bone margin as the disk herniated acutely, The posterior longitudinal ligament seemed to have prevented detachement of the bony fragment. Group 2 included 2 patients and CT findings as well as plain X-ray features were identical to a limbus vertebra. This was considered to represent passive displacement of bony fragment by the intravertebral herniation of the disk. Group 4 included 5 patients and was disclosed as a simple osteophyte. From our study it was concluded: (1) that the hard disc seen in lumbar CT scan was probably the results of the detachment of a bone fragment from the vertebral end plate which has an underlying weak area due to the herniated disc as well as a calcification or osteophyte formation and (2) specific terms (avulsed fragment limbus vertebra calcification or spur for-mation) is more preferable to use than hard disc which is inaccurate.

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