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1. (PDF) The lambda (twin peak) sign
The presence or absence of lambda sign, T-sign, dividing membrane thickness and number of placentae were used to determine chorionicity.HomePregnancyMedicineObstetricsTwinsArticlePDFAvailableLiteratureReviewThelambda(twinpeak)signJuly2018AbdominalRadiology43(7)DOI:10.1007/s00261-017-1356-4Authors:TsunWaiJeffreyWuTsunWaiJeffreyWuThispersonisnotonResearchGate,orhasn'tclaimedthisresearchyet.Yan-LinLiQueenMaryHospitalKinHoiWongDownloadfull-textPDFReadfull-textYou'redownloadingafull-textprovidedbytheauthorsofthispublication.Apreviewofthisfull-textisprovidedbySpringerNature.Downloadfull-textPDFReadfull-textDownloadcitationCopylinkLinkcopiedReadfull-textDownloadcitationCopylinkLinkcopiedCitations(1)References(2)Discovertheworld'sresearch20+millionmembers135+millionpublications700k+researchprojectsJoinforfreePublicFull-text1PublisherPreview1ContentuploadedbyYan-LinLiAuthorcontentAllcontentinthisareawasuploadedbyYan-LinLionOct23,2017Contentmaybesubjecttocopyright.Thelambda(twinpeak)signTsunWaiJeffreyWu,1Yan-LinLi,2Kin-HoiWong21LiKaShingFacultyofMedicine,UniversityofHongKong,HongKong,China2DepartmentofRadiology,QueenMaryHospital,UniversityofHongKong,K3,102PokfulamRoad,HongKong,ChinaThelambdasignreferstothetriangularprojectionofchorionbetweenthelayersofinter-twinmembraneswhichresemblestheGreekalphabet‘‘lambda’’(Fig.1).Itisbestobservedbetween10and14weeksofgestationonpelvicsonography,anditspresenceishighlysugges-tiveofdichorionicdiamniotic(DCDA)twinpregnancy(Fig.2).Thefuseddichorionicplacentaalsoassumestheappearanceofamountaintopbetweenthetwingesta-tionalsacs;thusthemetaphoricalsourceofitsalternatetitle,the‘‘twinpeak’’sign(Fig.3)[1].CompliancewithethicalstandardsFundingNofundingwasreceivedforthisstudy.ConflictofinterestTheauthorsdeclarethattheyhavenoconflictofinterest.EthicalapprovalThisarticledoesnotcontainanystudieswithhumanparticipantsoranimalsperformedbyanyoftheauthors.InformedconsentStatementofinformedconsentwasnotapplicablesincethemanuscriptdoesnotcontainanypatientdata.Ref
2. Twin peak sign or lambda sign : feature of dichorionic
Twin peak sign or lambda sign : feature of dichorionic diamniotic twin pregnancydefinition explanation figure T signFor anatomy lecture ...OverPersAuteursrechtContactCreatorsAdverterenOntwikkelaarsVoorwaardenPrivacyBeleidenveiligheidZowerktYouTubeNieuwefunctiestesten©2021GoogleLLCYouTube,eenbedrijfvanGoogle
3. Chorionicity determination: lambda sign on 3D scan
In DCDA twins there is a triangular placental tissue projection (lambda sign) into the base of the membrane. Lambda sign (or twin peak sign) is ...TietojaLehdistöTekijänoikeudetOtayhteyttäSisällöntuottajatMainostaKehittäjätEhdotTietosuojaKäytännötjaturvallisuusNäinYouTubetoimiiKokeileuusiaominaisuuksia©2021GoogleLLC
4. 'False' lambda sign in monochorionic twin pregnancy
The lambda, or twin-peak, sign (the triangular projection of chorionic tissue extending into the intertwin membrane) is one of the most useful ...SkiptoMainContentCookiesdisabledToolsBrowsesampleissueGetContentalertsSubscribetothisjournalCookiesaredisabledforthisbrowser.WileyOnlineLibraryrequirescookiesforauthenticationanduseofothersitefeatures;therefore,cookiesmustbeenabledtobrowsethesite.DetailedinformationonhowWileyusescookiescanbefoundinourPrivacyPolicy.JournallistmenuJournalArticlesActionsToolsFollowjournalNavigationBarMenuHomeHomeBrowseAcceptedArticlesEarlyViewCurrentIssueAllIssuesFollowjournalAlertTwitterchannelFacebookpageRSSchannelLogintoWileyOnlineLibraryEmailorCustomerIDPasswordForgotpassword?NEWUSER>INSTITUTIONALLOGIN>ChangePasswordOldPasswordNewPasswordTooShortWeakMediumStrongVeryStrongTooLongPasswordChangedSuccessfullyYourpasswordhasbeenchangedCreateanewaccountEmailorCustomerIDReturninguserForgotyourpassword?Enteryouremailaddressbelow.EmailorCustomerIDPleasecheckyouremailforinstructionsonresettingyourpassword.Ifyoudonotreceiveanemailwithin10minutes,youremailaddressmaynotberegistered,andyoumayneedtocreateanewWileyOnlineLibraryaccount.RequestUsernameCan'tsignin?Forgotyourusername?EnteryouremailaddressbelowandwewillsendyouyourusernameEmailorCustomerIDCloseIftheaddressmatchesanexistingaccountyouwillreceiveanemailwithinstructionstoretrieveyourusername
5. Evolution of the lambda or twin-chorionic peak sign in
Conclusions: At 10-14 weeks' gestation, twin pregnancies with the lambda sign can be classified as dichorionic and pregnancies with absent lambda sign can be ...Clipboard,SearchHistory,andseveralotheradvancedfeaturesaretemporarilyunavailable.SkiptomainpagecontentCOVID-19InformationPublichealthinformation(CDC)Researchinformation(NIH)SARS-CoV-2data(NCBI)Preventionandtreatmentinformation(HHS)Español AccesskeysNCBIHomepageMyNCBIHomepageMainContentMainNavigationSearch:SearchAdvancedClipboardUserGuideSaveEmailSendtoClipboardMyBibliographyCollectionsCitationmanagerDisplayoptionsDisplayoptionsFormatAbstractPubMedPMIDSavecitationtofileFormat:Summary(text)PubMedPMIDAbstract(text)CSVCreatefileCancelEmailcitationSubject:1selecteditem:9052601-PubMedTo:Format:SummarySummary(text)AbstractAbstract(text)MeSHandotherdataSendemailCancelAddtoCollectionsCreateanewcollectionAddtoanexistingcollectionNameyourcollection:Namemustbelessthan100charactersChooseacollection:UnabletoloadyourcollectionduetoanerrorPleasetryagainAddCancelAddtoMyBibliographyMyBibliographyUnabletoloadyourdelegatesduetoanerrorPleasetryagainAddCancelYoursavedsearchNameofsavedsearch:Searchterms:TestsearchtermsWouldyoulikeemailupdatesofnewsearchresults?SavedSearchAlertRadioButtonsYesNoEmail:(change)Frequency:MonthlyWeeklyDailyWhichday?ThefirstSundayThefirstMondayThefirstTuesdayThefirstWednesdayThefirstThursdayThefirstFridayThefirstSaturdayThefirstdayThefirstweekdayWhichday?SundayMondayTuesdayWednesdayThursdayFridaySaturdayReportformat:SummarySummary(text)AbstractAbstract(text)PubMedSendatmost:1item5items10items20items50items100items200itemsSendevenwhentherearen'tanynewresultsOptionaltextinemail:SaveCancelCreateafileforexternalcitationmanagementsoftwareCreatefileCancelYourRSSFeedNameofRSSFeed:Numberofitemsdisplayed:510152050100CreateRSSCancelRSSLinkCopyActionsCiteFavoritesDisplayoptionsDisplayoptionsFormatAbstractPubMedPMIDSharePermalinkCopyPagenavigationTitle&authorsAbstractSimilararticlesCitedbyMeSHtermsRelatedinformation
6. Twin-peak sign (twin pregnancy)
The twin peak sign (also known as the lambda (λ) sign) is a triangular appearance of the chorion insinuating between the layers of the intertwin membrane ...×ArticlesLogInCasesSignUpCoursesQuizDonateAbout×MenuSearchADVERTISEMENT:Radiopaediaisfreethankstooursupportersandadvertisers.BecomeaGoldSupporterandseenoads.ArticlesCasesCoursesLogInLoginSignup{"url":"/signup-modal-props.json?lang=us\u0026email="}ArticlesCasesCoursesQuizAboutRecentEditsGoad-freeSearchTwin-peaksign(twinpregnancy)AssocProfCraigHacking◉◈andAssocProfFrankGaillard◉◈etal.Thetwinpeaksign (alsoknownasthelambda(λ) sign) isatriangularappearanceofthechorion insinuatingbetweenthelayersoftheintertwinmembrane andstronglysuggestsadichorionictwinpregnancy. Itisbestseeninthefirsttrimester(between10-14weeks) 5.Whilethepresenceofatwinpeaksignisausefulindicatorofdichorionicity,itsabsence,however,isnotthatusefulinconfidentlyexcludingit.Itshouldbenotedthatthe'twin'in'twin-peak'refersnottothepresenceoftwopeaks,butthatitrelatestotwins.Inpregnancieswithmorethantwofetuses,thechorionicityandamnionicityofeachfetusmaybedifferent,andthereforethissignonlyaidsindeterminingchorionicityofadjacenttwins.SeealsoTsign:referstotheappearanceoftheinter-twinmembraneinamonochorionictwinpregnancy lambdasignofsarcoidosisQuizquestions{"containerId":"expandableQuestionsContainer","displayRelatedArticles":true,"displayNextQuestion":true,"displaySkipQuestion":true,"articleId":2232,"mcqUrl":"https://radiopaedia.org/articles/twin-peak-sign-twin-pregnancy/questions/2175?lang=us"}References1.WeisslederR,WittenbergJ,HarisinghaniMG.Primerofdiagnosticimaging.MosbyInc.(2007)ISBN:0323040683.ReaditatGoogleBooks-FinditatAmazon2.NybergDA,McGahanJP,PretoriusDH.Diagnosticimagingoffetalanomalies.LippincottWilliams&Wilkins.(2003)ISBN:0781732115.ReaditatGoogleBooks-FinditatAmazon3.TropI.Thetwinpeaksign.Radiology.2001;220(1):68-9.Radiology(fulltext)-Pubmedcitation4.MerzE.Ultrasoundinobstetricsandgynecology,Gynecology.ThiemePublishingGroup.(2007)ISBN:3137544025.
7. T sign (obstetrics)
×ArticlesLogInCasesSignUpCoursesQuizDonateAbout×MenuSearchADVERTISEMENT:Radiopaediaisfreethankstooursupportersandadvertisers.BecomeaGoldSupporterandseenoads.ArticlesCasesCoursesLogInLoginSignup{"url":"/signup-modal-props.json?lang=gb\u0026email="}ArticlesCasesCoursesQuizAboutRecentEditsGoad-freeSearchTsign(obstetrics)AssocProfCraigHacking◉◈andAssocProfFrankGaillard◉◈etal.The"Tsign"isreallytheabsenceofatwin-peaksign (orlambda(λ) sign)andisusedinultrasoundassessmentofamultifetalpregnancy.Itreferstothelackofchorionextendingbetweenthelayersoftheintertwinmembrane,denotingamonochorionicpregnancy.TheintertwinmembranecomestoanabrupthaltattheedgeinaTconfiguration.Quizquestions{"containerId":"expandableQuestionsContainer","displayRelatedArticles":true,"displayNextQuestion":true,"displaySkipQuestion":true,"articleId":2142,"mcqUrl":"https://radiopaedia.org/articles/t-sign-obstetrics/questions/2175?lang=gb"}References1.WeisslederR,WittenbergJ,HarisinghaniMMet-al.PrimerofDiagnosticImaging,ExpertConsult-OnlineandPrint.Mosby.(2011)ISBN:0323065384.ReaditatGoogleBooks-FinditatAmazon2.NybergDA,McGahanJP,PretoriusDH.Diagnosticimagingoffetalanomalies.LippincottWilliams&Wilkins.(2003)ISBN:0781732115.ReaditatGoogleBooks-FinditatAmazon3.TropI.Thetwinpeaksign.Radiology.2001;220(1):68-9.Radiology(fulltext)-Pubmedcitation4.MerzE,BahlmannF.Ultrasoundinobstetricsandgynecology.ThiemeMedicalPublishers.(2005)ISBN:1588901475.ReaditatGoogleBooks-FinditatAmazonRelatedRadiopaediaarticlesUltrasound-obstetricultrasound(introduction)obstetricultrasoundfirsttrimester andearlypregnancygestationalsacdoubledecidualsacsignintradecidualsacsignmeansacdiameteremptygestationalsacpseudogestationalsacyolksacembryo/fetuscrownrumplength(CRL)fetalheartratefetaltachycardiafetalbradycardiafetalbradyarrhythmia(s)gestationalagephysiologicgutherniationembryonicrhombencephalonamnionchorionbeta-hCGlevelsectopicpregnancytubalectopicinterstitialorcornualectopiccervicalectopicovarianectopicabdominalectopicheterotopicpregnancyCa
8. T sign (obstetrics)
The "T sign" is really the absence of a twin-peak sign (or lambda (λ) sign) and is used in ultrasound assessment of a multifetal pregnancy.×ArticlesLogInCasesSignUpCoursesQuizDonateAbout×MenuSearchADVERTISEMENT:Radiopaediaisfreethankstooursupportersandadvertisers.BecomeaGoldSupporterandseenoads.ArticlesCasesCoursesLogInLoginSignup{"url":"/signup-modal-props.json?lang=us\u0026email="}ArticlesCasesCoursesQuizAboutRecentEditsGoad-freeSearchTsign(obstetrics)AssocProfCraigHacking◉◈andAssocProfFrankGaillard◉◈etal.The"Tsign"isreallytheabsenceofatwin-peaksign (orlambda(λ) sign)andisusedinultrasoundassessmentofamultifetalpregnancy.Itreferstothelackofchorionextendingbetweenthelayersoftheintertwinmembrane,denotingamonochorionicpregnancy.TheintertwinmembranecomestoanabrupthaltattheedgeinaTconfiguration.Quizquestions{"containerId":"expandableQuestionsContainer","displayRelatedArticles":true,"displayNextQuestion":true,"displaySkipQuestion":true,"articleId":2142,"mcqUrl":"https://radiopaedia.org/articles/t-sign-obstetrics/questions/2175?lang=us"}References1.WeisslederR,WittenbergJ,HarisinghaniMMet-al.PrimerofDiagnosticImaging,ExpertConsult-OnlineandPrint.Mosby.(2011)ISBN:0323065384.ReaditatGoogleBooks-FinditatAmazon2.NybergDA,McGahanJP,PretoriusDH.Diagnosticimagingoffetalanomalies.LippincottWilliams&Wilkins.(2003)ISBN:0781732115.ReaditatGoogleBooks-FinditatAmazon3.TropI.Thetwinpeaksign.Radiology.2001;220(1):68-9.Radiology(fulltext)-Pubmedcitation4.MerzE,BahlmannF.Ultrasoundinobstetricsandgynecology.ThiemeMedicalPublishers.(2005)ISBN:1588901475.ReaditatGoogleBooks-FinditatAmazonRelatedRadiopaediaarticlesUltrasound-obstetricultrasound(introduction)obstetricultrasoundfirsttrimester andearlypregnancygestationalsacdoubledecidualsacsignintradecidualsacsignmeansacdiameteremptygestationalsacpseudogestationalsacyolksacembryo/fetuscrownrumplength(CRL)fetalheartratefetaltachycardiafetalbradycardiafetalbradyarrhythmia(s)gestationalagephysiologicgutherniationembryonicrhombencephalonamnionchori
9. Twin-peak sign (twin pregnancy)
×ArticlesLogInCasesSignUpCoursesQuizDonateAbout×MenuSearchADVERTISEMENT:Radiopaediaisfreethankstooursupportersandadvertisers.BecomeaGoldSupporterandseenoads.ArticlesCasesCoursesLogInLoginSignup{"url":"/signup-modal-props.json?lang=us\u0026email="}ArticlesCasesCoursesQuizAboutRecentEditsGoad-freeSearchTwin-peaksign(twinpregnancy)AssocProfCraigHacking◉◈andAssocProfFrankGaillard◉◈etal.Thetwinpeaksign (alsoknownasthelambda(λ) sign) isatriangularappearanceofthechorion insinuatingbetweenthelayersoftheintertwinmembrane andstronglysuggestsadichorionictwinpregnancy. Itisbestseeninthefirsttrimester(between10-14weeks) 5.Whilethepresenceofatwinpeaksignisausefulindicatorofdichorionicity,itsabsence,however,isnotthatusefulinconfidentlyexcludingit.Itshouldbenotedthatthe'twin'in'twin-peak'refersnottothepresenceoftwopeaks,butthatitrelatestotwins.Inpregnancieswithmorethantwofetuses,thechorionicityandamnionicityofeachfetusmaybedifferent,andthereforethissignonlyaidsindeterminingchorionicityofadjacenttwins.SeealsoTsign:referstotheappearanceoftheinter-twinmembraneinamonochorionictwinpregnancy lambdasignofsarcoidosisQuizquestions{"containerId":"expandableQuestionsContainer","displayRelatedArticles":true,"displayNextQuestion":true,"displaySkipQuestion":true,"articleId":2232,"mcqUrl":"https://radiopaedia.org/articles/twin-peak-sign-twin-pregnancy/questions/2175?lang=us"}References1.WeisslederR,WittenbergJ,HarisinghaniMG.Primerofdiagnosticimaging.MosbyInc.(2007)ISBN:0323040683.ReaditatGoogleBooks-FinditatAmazon2.NybergDA,McGahanJP,PretoriusDH.Diagnosticimagingoffetalanomalies.LippincottWilliams&Wilkins.(2003)ISBN:0781732115.ReaditatGoogleBooks-FinditatAmazon3.TropI.Thetwinpeaksign.Radiology.2001;220(1):68-9.Radiology(fulltext)-Pubmedcitation4.MerzE.Ultrasoundinobstetricsandgynecology,Gynecology.ThiemePublishingGroup.(2007)ISBN:3137544025.ReaditatGoogleBooks-FinditatAmazon5.FongKW,ToiA,SalemSet-al.DetectionoffetalstructuralabnormalitieswithUSduringearlypregnancy.Radiographics.24(1):157-74.doi:
10. Diagnosis of chorionicity: The role of ultrasound
InicioDiagnósticoPrenatalDiagnosisofchorionicity:TheroleofultrasoundISSN:2173-4127>>LealanotainformativadelaJuntaDirectiva<