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1、影像诊断（imagingdiagnosis）Iftheepiphysisappearsdelayed,thedensityislowandtheedgemodulusislowThecalcificationbandofthemetaphysisisirregular,vague,thinninganddisappearing.Themiddlepartofepiphysisistortuousandsunken,andcupshaped,Themarginisirregularandbrushlike,andthedi
2、stancebetweenepiphysisandepiphysisiswidened.Bonelikechangesintheepiphysisofthemetaphysis.AnteriorribWidecupmouth.Commonbendingdeformationoflongbonebearingatthesametime.(Oleg,Xleg,etc.),afewpatientscanbegreenBranchfractureX-rayappearanceofthehealing:thetemporaryca
3、lcificationbandreappeared,andthecupmouthdepressionandbrushshapechangedanddisappeared.MetaphysisSpacingreturnedtonormal.Bonedensityincreasedandcorticalbonethickened.Epiphysealenlargement,increaseddensity,aslongasbonedeformationIn.4.Thedifferentialdiagnosisofbenign
4、andmalignantbonetumorsfromX-rayfeaturesBenign:Whetherornotmetastasis:nometastasisGrowth:slowgrowth,noinvasionofadjacenttissues,butcancausecompressiondamageLocalbonechanges:expansivebonedestruction,clearboundarieswiththenormalbone,sharpedge,thinningofcorticalbone,
5、expansioncanprotectHoldingitscontinuityPeriostealhyperplasia:thereisnoperiostealhyperplasia,pathologicalfracturecanhaveasmallamountofperiostealhyperplasia,andperiostealnewboneisnotdestroyedSurroundingsofttissuechanges:noswellingormassshadow,suchaslumps,clearedges
6、Angiography:normalvasculardifferentiation,tumorcompressionofthebloodvessels,sothatthepull,displacementMalignant:Thereisnometastasis:thereismetastasisGrowth:rapidgrowth,easyinvasionandadjacenttissuesandorgansLocalbonechanges:infiltrationofbonedestruction,lesionsan
7、dnormalboneboundariesblurred,marginal,involvingthebonecortex,resultingIrregulardestructionanddefectmayleadtotumorboneformationPeriostealhyperplasia:therearedifferentformsofperiostealhyperplasia,andcanbedamagedbytumorinvasionPeripheralsofttissuechanges:softtissuef
8、ormedintothemass,andtheboundaryofthesurroundingtissueisunclearAngiography:thetumorvesselsweremanyanddisorderly,tumorstainingandarteriovenousfistula,butalsovisi
