| Objective: Imaing data indicates that lumbar hyperostosis occur mostlyon the anterior and anterolateral of lumbar body. Animal experiment showsthat osteophyte will be formed when the ventral nucleus pulposus herniatesmanually, while when the dorsal nucleus pulposus herniates, the osteophytewill not be formed. All of this point out that there may be associationbetween the formation of osteophyte and anterior longitudinal ligament(ALL). The purpose of this study is to explore their relationship throughmeasuring the common distribution range of osteophyte at the front edge oflumbar body on CT and that of ALL on specimens.Methods: Imaing data of170subjects who were referred for plain scanand three-dimensional reconstruction of lumbar spine from January2011toMay2012in our hospital were retrospectively analyzed. Osteophyte formation and type, the maximum angle of osteophyte covers lumbar bodywere recorded. Dissected2fresh adult lumbar spine specimens andmeasured distribution range of ALL at different levels.Results: There are68subjects contain osteophyte visible to naked eye.Among them,33subjects contain only type I osteophyte,12subjects containonly type Ⅱosteophyte, and23subjects contain both of two.102subjectsdo not have obvious osteophyte. The maximum angle of type I osteophytecovers lumbar body at different levels are (53.9±13.2) and (58.3±22.3),(63.8±16.4) and (55.1±18.0),(72.8±21.3) and (70.5±16.1),(76.8±17.6) and(81.6±14.4),(65.3±28.1) and (63.6±24.2), respectively. The maximum angelof ALL covers lumbar body at different levels of specimen1are54.1and58.0,64.0and59.4,74.2and71.2,77.3and80.5,64.9and64.2. That ofspecimen2are53.8and59.1,63.5and62.0,71.7and69.7,78.2and82.3,66.2and62.7.Conclusion: Lumbar hyperostosis occur mostly at L3and L4levels(30.7%and29.7%), the distribution range of osteophyte at the front edge oflumbar body and that of ALL are general accord. Objective: To investigate the correlation between lumbar hyperostosisand disc bulge or herniation, and analyze main MRI signal of osteophyte.Methods:202subjects who were referred for MR imaging of thelumbar spine from July2011to January2012in our hospital wereretrospectively analyized. Osteophyte formation, the maximum length andsignal of osteophyte, degree of disc bulge or herniation were recorded.Pearson correlation analysis between the maximum length of osteophyte anddegree of disc bulge or herniation among whole sample, men and womenwere finished respectively.Results:202subjects contain1010vertebral bodies, among them thereare156vertebral bodies containing osteophyte visible to naked eye. Equal orhigh T1and T2, equal STIR is the main signal type of osteophyte. Meanmaximum osteophyte length is (5.80±2.40) mm, and mean disc bulge orherniation degree is (6.17±2.64) mm. They have obvious correlation（r=0.83，P＜0.05）. Mean maximum osteophyte length of men and wowen are（6.61±2.49）mm and（5.06±2.06）mm respectively, mean disc bulge orherniation degree are（7.28±2.80）mm and（5.13±2.00）mm. They are bothstatistically significant（P＜0.05）. The correlation coefficient between maximum osteophyte length and disc bulge or herniation degree of men andwowen is0.79and0.83.Conclusion: There is a strong correlation between lumbar hyperostosisand disc bulge or herniation; equal or high T1and T2, equal STIR is the mainsignal type of osteophyte. Objective: To investigate the relationship between MR signal type andCT features on lumbar hyperostosis, and the possible mechanism ofvertebral body remodeling on degenerative lumbar spine.Methods: Imaging data of45subjects who were referred for both MRand CT imaging of the lumbar spine from July2011to January2012in ourhospital were retrospectively analyzed. VR and MPR were used to observestructural characteristics of osteophyte. Osteophyte formation, MR signaltype and CT features of osteophyte were recorded, then analyzed their relationship.Results:45subjects contain225vertebral bodies, there are38vertebralbodies containing osteophyte visible to naked eye. The four types of MRsignal are type I to type Ⅳ, accounting for2(5.3%),4(10.5%),10(26.3%)and22(57.9%), respectively. The three types of CT structural characteristicsare type A to type C, accounting for4(10.5%),11(28.9%) and23(60.5%),respectively. The main MR signal of type A is type Ⅱ(100%), and type Band C are both type Ⅳ(72.7%and65.2%).Conclusion: There is a corresponding relation between MR signal typeand CT features on lumbar hyperostosis. Constant reconstruction ofosteophyte remodels vertebral body on degenerative lumbar spine. |
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