简介：目的探讨高分辨率颞骨CT密度在诊断耳硬化中的作用。方法分析手术确诊的耳硬化患者34例（34耳，病例组）和同期确诊的周围性面瘫患者33例（对侧正常耳33耳，对照组）的颞骨CT扫描和纯音听阈测试结果。在0．75mm层厚颞骨CT轴位层面的耳囊周围，手动设置7个兴趣区，测量平均cT值。根据CT表现将耳硬化病例分为2个亚组：A组，CT显示无病理变化；B组，耳蜗区骨密度降低。比较各兴趣区病例组与对照组平均CT值的差异，分析病例组CT表现与纯音测听结果的关系。结果卵圆窗后缘和卵圆窗前缘这两个兴趣区，病例组平均CT值明显低于对照组（卵圆窗后缘t=-2．030，P=0．046；卵圆窗前缘Z=-4．979，P〈0．01）。A组30例，包括传导性聋9例（30％），混合性聋21例（70％）；B组4例，包括传导性聋1例（25％），混合性聋3例（75％）。结论耳硬化患者卵圆窗周围骨质CT密度可能发生改变。

简介：AIM:ToevaluatethecornealendothelialcelldensityandmorphologyinChinesepatientswithpseudoexfoliationsyndrome(PEX).·METHODS:Medicalrecordsof16patients(20eyes)withPEXwhopresentedtoourinstitutionbetweenJuly2008andJune2010wereretrospectivelyreviewed.Thirteeneyeshadcombinedglaucoma.Theinformationoffiveapparentlynormalfelloweyesinthesepatientswasalsorecorded.Lefteyesof20patientswithbilateralsenilecataractsbutnoothereyediseasewereincludedascontrols.Specularmicroscopywasperformedinalleyestoanalyzeforcornealendothelialcelldensityandmorphology.Celldensity,coefficientofvariationincellsize,andpercentageofhexagonalcellsincornealendotheliumwereevaluated.·RESULTS:ThemeancornealendothelialcelldensityinthePEXeyeswas2298±239cells/mm2,significantlylowerthanthatinthecataracteyes(2652±18cells/mm2,P=0.026),buttherewerenosignificantdifferencesincoefficientofvariationofcellsizeandfrequencyofhexagonalitybetweenthesetwogroups.NosignificantdifferencesinthethreeparameterswerefoundbetweentheapparentlynormalfelloweyesandthePEXeyesorthecataracteyes,orbetweenthePEXeyeswithandwithoutglaucoma.·CONCLUSION:CornealendothelialcelldensitymaydecreaseinChinesepatientswithPEX.ThedevelopmentofglaucomainPEXeyesdoesnotseemtoberelatedwiththechangeincornealendothelialcelldensityormorphology.