简介：ObjectiveToanalyzethecharacteristicsofauditorybrainstemresponse(ABR)inpresbycusispatientsel-derthan90years.MethodsFourteenpresbycusispatientselderthan90years(presbycusisgroup,91.1.4±1.3years,26ears)and9normal-hearingyoungadults(controlgroup,22.7±1.2years,18ears)participatedinthestudy.Alternativeclick-evokedABRswererecordedinbothgroups.Thepeaklatency(PL)ofpeakI,Ⅲ,andV,andtheinter-peaklatency(IPI)ofI-Ⅲ,Ⅲ-V,andI-Vwerecomparedbetweengroups.ResultsInelderpresbycusispatients,theoccurrencerateofpeakIandⅢwereboth76.9%,andthatofpeakVwas84.6%.Inpresbycusisgroup,thepeaklatenciesofI,Ⅲ,Vweresignificantlylongerthanthatofcontrolgroup(P<0.001).TherewasnosignificantdifferencebetweengroupsintheIPIofpeakI-IⅢ(P=0.298,peakⅢ-V(P=0.254)andpeakI-V(P=0.364).ConclusionsAuditorybrainstemresponsesinpresbycusispa-tientselderthan90yearsshowedworsewavedifferentiation.

简介：目的：分析90岁以上老年性聋患者听性脑干反应（ABR）的特征。方法对14例90岁以上老年性聋患者（平均年龄91.1.4±1.3岁，26耳）进行交替短声ABR测试。听力正常人9例（平均年龄22.7±1.2岁，18耳）作为对照组。观测Ⅰ、Ⅲ、Ⅴ波的峰潜伏期（PeakLatency，PL）和Ⅰ-Ⅲ、Ⅲ-Ⅴ、Ⅰ-Ⅴ波间期（Inter-PeakLatency，IPL），并分别与对照组总体均数进行比较。结果总体的I波引出率和Ⅲ波引出率均为76.9%（20/26），V波引出率为84.6%（22/26）。高龄老年性聋组各波PL较对照组延长。Ⅰ-Ⅲ波IPL、Ⅲ-Ⅴ波IPL、Ⅰ-Ⅴ波IPL无组间统计学差异。结论90岁以上高龄老年性聋患者ABR波形分化较差。

简介：恶性肿瘤是一类细胞周期疾病,几乎所有癌基因、抑癌基因的生物学效应,最终都会集到细胞周期机制上来。细胞周期蛋白D1(CyclinD1)作用于细胞周期的G1→S期调控点,为G1期的限速步骤。研究CyclinD1与头颈部恶性肿瘤发生发展的关系,对了解头颈部恶性肿瘤的发病机制以及基因疗法的开展提供依据。本文对CyclinD1在头颈部恶性肿瘤发生发展中的作用做一综述。

简介：TBC1D24基因编码含TBC结构域和TLDc结构域的蛋白质。该基因具有基因多效性,所涉及的基因型-表型关联复杂,不同突变可分别导致重度-极重度先天性耳聋、迟发性/渐进性耳聋等不同听力表型及在神经、骨骼等系统的不同发育障碍。在内耳中,TBC1D24表达于螺旋神经节及毛细胞静纤毛,具有特异的表达位置和表达时间。对该基因的功能学研究有助于人们了解听觉及神经系统的发育及相关遗传性疾病的分子发病机制。

简介：Aim:Toassessthequalityofhigh-resolutionCTsectionplanes(HRCT),multi-planarreformation(MPR)and3-dimensionalvolumerenderedcomputertomography(3D-CTVR)werehereusedinthefinedifferentialdiagnosisofossicularchaininthecaseofconductivehearinglosswithintacttympanicmembrane.Methods:Here,17casesofotosclerosisand22casesofossicularchaindeformitywereselected.Allpatientshadnormalexternalearcanals,intacttympanicmembranes,conductivehearingloss,typeAtympanograms,andnegativeGelle'stests.Therespectiveradiologicalreportsofthestatusoftheossiclesvia3protocolswerecomparedtosurgicalfindings.Thequantitativeassessmentsoftherepresentationofdifferentsegmentsoftheossicularchainwerebasedona3-pointscoringsystem.Results:MPRandCTVRimagingbothshowedtheintegrityofwholeossicularchainwell.MPRandCTVRimagingwerefoundtobesuperiortosectionplaneswithrespecttoshowingthesuperstructureofthestapesandmalformations(P>0.05).Conclusion:CTVRandMPRimagingwerefoundtobebetterabletoshowthewholeossicularchainintheconductivehearinglosswithnormaltympanicmembranes.Furthermore,theuseofthesetechniquescanhaveprofoundcontributivevalueinthedifferentialdiagnosisofotosclerosisandossicularchainabsenceormalformation.