简介：患者,男,44岁,住院号242392.患者2001年9月中旬觉右眼视力开始下降,迅速加重,伴有眼痛、头痛,遂来我院,门诊查见右眼上方视网膜脱离,做B超(2001-12516):"右眼鼻上方眼底前探及8.3×13.48mm的高回声,内部挖空及脉络膜凹陷,鼻下、颞上、鼻上方视网膜脱离光带2～5mm.

简介：目的探讨微小型甲状腺乳头状癌颈淋巴转移的临床意义.方法回顾性分析1998年5月～2001年12月住院治疗的27例微小型甲状腺乳头状癌患者,其中23例行颈清扫术,并与同期住院治疗的144例非微小型甲状腺乳头状癌进行对比.结果微小型与非微小型甲状腺乳头状癌颈部淋巴结转移分别为12/23(52.2%)、108/144(75.0%),淋巴结阳性率分别为29.7%、37.8%;Ⅵ区淋巴结转移分别为9/23(39.1%)、43/58(74.1%),淋巴结阳性率分别为32.0%、58.4%;Ⅰ-Ⅴ区淋巴结转移分别为11/23(47.8%)、93/144(64.6%),淋巴结阳性率分别为15.2%、34.9%,三者统计学均有显著性意义.10例临床颈部N0微小型甲状腺乳头状癌患者,6例病理检查发现淋巴结转移.结论微小型甲状腺乳头状癌患者颈淋巴结转移比非微小型低,以颈静脉链为常见部位,其次是气管食管沟.对一个确诊为微小型甲状腺乳头状癌患者,都应行颈清扫术.

简介：白内障是最常见的致盲眼病之一。谷胱甘肽S转移酶（glutathioneS-transferases,GSTs）是典型的多功能酶,主要催化各种化学剂与谷胱甘肽结合。近些年的研究表明,GSTs有抗过氧化引起的白内障作用。GSTs表达水平的高低在白内障形成中有着重要的作用。我们将近年来GSTs与年龄相关性白内障的研究情况做一综述。

简介：头颈鳞癌为头颈部常见的恶性肿瘤，近年来虽然手术联合辅助治疗取得了一定的进展，但是总体生存率并没有显著提高。研究表明，基质金属蛋白酶9不仅与头颈鳞癌的发生、发展、上皮-问充质转化及血管生成相关，而苴能通过多种方式促进肿瘤的侵袭与转移，是头颈鳞癌患者预后不良的主要因素。

简介：AIM:Toinvestigatewhether15-Lipoxygenase-1(15-LOX-1)playsanimportantroleintheregulationofangiogenesis,inhibitinghypoxia-inducedproliferationofretinalmicrovascularendothelialcells(RMVECs)andtheunderlyingmechanism.METHODS:PrimaryRMVECswereisolatedfromtheretinasofC57/BL6JmiceandidentifiedbyanevaluationforFITC-markedCD31.ThehypoxiamodelswereestablishedwiththeBio-bagandevaluatedwithablood-gasanalyzer.ExperimentswereperformedusingRMVECstreatedwithandwithouttransferAd-15-LOX-1orAd-vectorbothunderhypoxiaandnormoxiaconditionat12,24,48,72hours.Theefficacyofthegenetransferwasassessedbyimmunofluorescencestaining.CellsproliferationwasevaluatedbytheCCK-8method.RNAandproteinexpressionsof15-LOX-1,VEGF-A,VEGFR-2,eNOsandPPAR-rwereanalyzedbyreal-timereversetranscriptionpolymerasechainreaction(RT-PCR)andWesternblot.RESULTS:RoutineevaluationforFITC-markedCD31showedthatcellswerepure.Theresultsofblood-gasanalysisshowedthatwhenthecultureswereexposedtohypoxiaformorethan2hours,thePo2was4.5to5.4Kpa.WeverifiedRMVECscouldbeinfectedwithAd-15-LOX-1orAd-vectorviaFluorescencemicroscopy.CCK-8analysisrevealedthattheproliferativecapacitiesofRMVECsinhypoxicgroupweresignificantlyhigherateachtimepointthantheywereinnormoxicgroup(P<0.05).Inahypoxiccondition,theproliferativecapacitiesofRMVECsin15-LOX-1groupweresignificantlyinhibited(P<0.05).Real-timeRT-PCRanalysisrevealedthattheexpressionsofVEGF-A,VEGF-R2andeNOsmRNAincreasedinhypoxiagroupcomparedwithnormoxiagroup(P<0.01).However,theexpressionsof15-LOX-1,PPAR-rmRNAdecreasedinhypoxiagroupcomparedwithnormoxiagroup(P<0.01).Italsoshowedthatinahypoxiccondition,theexpressionsofVEGF-A,VEGF-R2andeNOsmRNAdecreasedsignificantlyin15-LOX-1groupcomparedwithhypoxiagroup(P<0.01).However,15-LOX-1andPPAR-rmRNAincreasedsigni

简介：AIM:Todescribethecharacteristicsofmodulationtransferfunction(MTF)ofanteriorcornealsurface,andobtainthethenormalreferencerangeofMTFatdifferentspatialfrequenciesandopticalzonesoftheanteriorcornealsurfaceinmyopes.·METHODS:Fourhundredeyesfrom200patientswereexaminedunderSIRIUScornealtopographysystem.PhoenisanalysissoftwarewasappliedtosimulatetheMTFcurvesofanteriorcornealsurfaceatverticalandhorizontalmeridiansatthe3,4,5,6,7mmopticalzonesofcornea.TheMTFvaluesatspatialfrequenciesof5,10,15,20,25,30,35,40,45,50,55and60cycles/degree(c/d)wereselected.·RESULTS:TheMTFcurveofanteriorcornealsurfacedecreasedrapidlyfromlowtointermediatefrequency(0-15cpd)atvariousopticalzonesofcornea,thevaluedecreasedto0slowlyathigherfrequency(>15cpd).Withtheincreaseoftheopticalzonesofcornea,MTFcurvedecreasedgradually.3)Intherangeof3mm-6mmopticalzonesofthecornea,theMTFvaluesmeasuredathorizontalmeridianweregreaterthanthecorrespondingvaluesathorizontalmeridianofeachspatialfrequency,thedifferencewasstatisticallysignificant(P<0.05).At7mmopticalzonesofcornea,theMTFvaluesmeasuredathorizontalmeridianwerelessthanthecorrespondingvaluesatverticalmeridianat10-60spatialfrequencies(cpd),andthedifferencewasstatisticallysignificantin25,30,35,40,45,50cpd(P<0.05).·CONCLUSION:MTFcanbeusedtodescribetheimagingqualityofopticalsystemsatanteriorcornealsurfaceobjectivelyindetail.