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ID:19627954
大小:364.50 KB
页数:30页
时间:2018-10-04
《孤立性肺结节良性与恶性对比课件》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、Solitarypulmonarynodule:benignversusmalignant孤立性肺结节:良性与恶性对比Thedifferentialdiagnosisofasolitarypulmonarynoduleisbroadandmanagementdependsonwhetherthelesionisbenignormalignant.孤立性肺结节的鉴别诊断是很多的,处理方法依赖于该病变是良性还是恶性Inthisoverviewwewilldiscusssomeofthenewfeaturesthat
2、canhelptodifferentiatebetweenbenignandmalignantnodulesbaseduponCTandPET-CTfindings.在此篇文章,我们着重讨论下一些有助于鉴别良恶性结节的新特征,此特征是基于CT与PET-CT的检查结果CT:benignversusmalignantCalcificationSizeGrowthShapeMarginAirBronchogramsignSolidandGround-glasscomponentsContrastenhancement
3、CT:良性与恶性钙化大小生长速度形状边缘支气管含气征实性或磨玻璃样增强特征Calcification钙化Diffuse,central,laminatedorpopcorncalcificationsarebenignpatternsofcalcification.弥漫性,中心性,分层,爆米花钙化是良性钙化,Thesetypesofcalcificationareseeningranulomatousdiseaseandhamartomas这些形式的钙化最常见于错构瘤、肉芽肿性病变Theexceptiontot
4、heruleaboveiswhenpatientsareknowntohaveaprimarytumor.Forinstancethediffusecalcificationpatterncanbeseeninpatientswithosteosarcomaorchondrosarcoma.SimilarlythecentralandpopcornpatterncanbeseeninpatientswithGI-tumorsandpatientswhopreviouslyhadchemotherapy.一些
5、病人有原发肿瘤病史,可以表现为良性钙化例如骨肉瘤、软骨肉瘤可以表现弥漫性钙化。胃肠间质瘤的病人化疗后可以表现为中心性或苞米花钙化。Size大小Asolitarypulmonarynodule(SPN)isdefinedasasingleintraparenchymallesionlessthan3cminsizeandnotassociatedwithatelectasisorlymphadenopathy.Alesiongreaterthan3cmindiameteriscalledamass.孤立性结节定
6、义为小于3cm,不伴有肺不张、淋巴结转移,大于3cm的为肿块Thisdistinctionismade,becauselesionsgreaterthan3cmareusuallymalignant,whilesmallerlesionscanbeeitherbenignormalignant.以3cm为界,因为大于3cm的通常是恶性的,而小于3cm的可能是良性或恶性。RelationshipbetweenSPN-sizeandchanceofmalignancyinpatientswithhighriskfo
7、rlungcancer结节大小与恶性度具有密切相关性Growth生长速度ComparisonwithpriorimagingstudiesisoftenthemostusefulproceduretodeterminetheimportanceofthefindingofaSPN,sincestabilityover2yearsishighlyassociatedwithbenignity.与前次影像结果相比是鉴别孤立性结节良恶性的一个非常有用的方法。如果超过2年以上保持不变,这个结节就是良性结节Shape形态
8、Japanesescreeningstudiesshowedthatapolygonalshapeandathree-dimensionalratio>1.78wasasignofbenignity(2,3).日本的一项研究表明,多变形和三维立体比率大于1.78是良性结节的标志Apolygonalshapemeansthatthelesionhasmultiplefacets(mult
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