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Diagnosis&TreatmentOutlinesforCerebralAneurysmDefinitionPathogenesis:congenitalarterialdefect,atherosclerosis,infectionandtrauma.Onsetage:50-54yrs(SAH).GenderDominance:FemaleoverMale.Location:ICA,ACA,MCAandPCA.ClassificationA.Location:ICAsystem(ICA,ACA,ACoA,MCA,PCoA,AchA)/V-Bsystem(VA,BA,PCA,PICA,PACA).B.Size:Small(<0.5cm)/medium(0.6-1.5cm)/large(1.62.5cm)/giant(>2.5cm).C.Shape:saccular,berryandfusiform.ClinicalPresentationA.Rupture&Bleeding(SAH):a：IntracranialHypertension.b：DegeneratedConscience.c：Neuraldysfunction.d:Vascularspasm.B.Spaceoccupation.C.Cerebralischemia.Hunt-HessScaleGrade0:Nodeficitsordiscomforts.GradeI:HeadachebutnoneurologicalimpairmentGradeII:Cognitiveimpairmentssuchasforgetfulnessand/orarousalproblemssuchasdrowsinessand/orcranialneuropathy.GradeIII:Cognitive/arousaldeficitsandlimbdeficitsforpower,tone,and/orsensationGradeIV:Unconsciouswithmarkedchangesinlimbtone,powerGradeV:UnresponsiveDiagnosisA:LumbarPunctureB:ComputedTomographicAngiography(CTA)C:MagneticResonanceAngiography(MRA)D:DigitalSubtractionAngiography(DSA)IntravascularInterventionA：Indications.B：PopularMeans:DetachableCoils(Guglielmi),Stents(Neuroform,Leo&Wingspan),LiquidAgent(Onyx).C：IAESScale.D：Complications.NeurosurgicalTreatmentA：Indications.B：Surgicalapproaches.C：Monitoringapproaches.D：Complications.Conclusion&ProspectA:Rapidandnon-invasiveneuroimagingwouldcatchupwithDSAindiagnosinganeurysminthefuture.B:Comprehensiveapplicationofinterventionandsurgicaltreatmentsamplifiesadvantagesofeachotherthereforeimprovingprognosis.