SchoolmeesterJK,ParkKJ
Americanjournalofsurgicalpathology;Volume39,August,Issue10pp:-:-10
摘要淋巴结肌瘤病(LAM)是血管周上皮样细胞增生性病变,通常累及肺,表现为一种低级别、破坏性和进行性疾病,也可以发生于淋巴结及其它器官。因妇科肿瘤分期而行淋巴结切除的检查中有时会偶然发现LAM。到目前为止,关于偶然发现的淋巴结LAM在随后肺LAM发生中的临床意义,还没有研究。我们对本单位诊断的19例淋巴结LAM进行了研究。随访了所有的病人,随访时间3~个月(平均33.8个月)。病人皆为女性,年龄35~71岁(平均56.3岁)。19例均无结节性硬化、肾血管平滑肌脂肪瘤或肺LAM的病史。病变累及1~6个淋巴结(平均2个),病变范围占所有送检淋巴结的1%~%。18例随访无持续或复发淋巴结LAM的病人中,单个最大病变灶范围1~9mm(平均4.3mm)。1例随访有局部持续性淋巴结LAM者病变最大径为25mm。受累淋巴结部位为清扫手术常规送检的盆腔及腹膜后淋巴结。18例行HMB45、A和β-catenin的免疫组化检查:HMB45显示阳性,每例均呈灶状阳性,而A仅呈小灶状表达(39%)或阴性,β-catenin显示阳性,%呈弥漫性胞浆及胞膜(非核)表达。最近的临床随访,19例无一有肺LAM的表现。偶然发现的且病灶小于10mm的淋巴结LAM病人,缺乏结外LAM的症状,无进展为肺LAM的风险。AbstractLymphangioleiomyomatosis(LAM)isaproliferationofperivascularepithelioidcellstypicallyaffectingthelungasalow-grade,destructiveandprogressivediseasebutmayalsobefoundinlymphnodesandotherorgans.LAMissometimesseenasanincidentalfindinginlymphnodedissectionsperformedforstagingofgynecologictumors.Toourknowledge,nostudyhasinvestigatedtheclinicalsignificanceofincidentalnodalLAMinrelationtosubsequentdevelopmentofpulmonaryLAM.Weidentified19patientsfromourinstitutionwithLAMinlymphnodes.Follow-upwasavailablefor%ofpatientsandrangedfrom3tomonths(mean33.8mo).Allwerewomen,ranginginagefrom35to71years(mean56.3y).Nonehadahistoryoftuberoussclerosis,renalangiomyolipoma,orpulmonaryLAM.LAMinvolvementspanned1to6nodes(mean2),rangingfrom1%to%ofthetotalexcisedlymphnodes.ThesinglelargestfocusofnodalLAMrangedfrom1to9mm(mean4.3mm)in18patientswithoutevidenceofpersistentorrecurrentnodalLAM.Inthe1patientwithpersistentlocalnodalLAM,thegreatestdiameterwas25mm.Affectedlymphnodesiteswereregionalpelvicandretroperitonealchainsroutinelysampledinstagingoperations.AnimmunohistochemicalpanelofHMB45,A,andβ-cateninwasevaluatedin18cases.HMB45showedstrongbutusuallyfocalstainingineverycase