ABSTRACT
Objective TostudythedistributioncharacteristicsofModicchanges(MCs)onlumbarvertebraeinthepatientswith lowbackpain.Methods LumbarvertebraeMRIresultsfrom276patients(male:104,female:172)wereanalyzedretrospetively.The MConlumbarvertebraewereclassifiedwithT1WI,T2WIandT2WI-FS,meanwhiletheincidence,predilectionsitesanddistribution characteristicsbyageandsexwerestatisticallyanalyzed.Results 139cases(50.4%)couldbeseenwith MC,including42malesand 97females;while137caseswerenormal(49.6%).Classifiedbygender,numbersofpatientswith MCinagegroup20－39 were7 (male)and11(female);inagegroup40－59,were15(male)and44(female);andinagegroup60－78,were20(male)and42(female). Amongatotalof2760vertebralendplates,2450 (88.8%)wereclassifiedasModicType0,65 (2.4%)asTypeⅠ,153 (5.5%)as TypeⅡ,3 (0.1%)asTypeⅢ,and89 (3.2%)as MixedType.ThenumbersofMCoccurringonendplatesofL5/S1,L4/5,L1/2 were108,103and15respectively.Conclusion MCTypeⅡoflumbarvertebraeisthemostprevalent,followedbythe MixedType and MCTypeⅠ.MCTypeⅢistheleast.Inallthreeagegroups,theincidencerateishigherinfemalepatientsthanthatinmales. Regardlessofthegender,theincidenceofMCislinearlypositivecorrelatedwithage.MCoccursmostlyonendplatesofL5/S1and L4/5,andrarelyonendplateofL1/2.