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1、ThePlacentaRevisited:Radiologic–PathologicCorrelationaabJeffreyP.Kanne,MD,TasneemA.Lalani,MD,andCorinneL.Fligner,MDTheplacentaisthecentralsupportorganforthedevelopingreservedforevaluatingconditionssuchasplacentafetus.Recognitionofplacentalvariantsandi
2、nsigni?cantincretaorplacentalabruption.?ndingsisimportantsoasnottosuggestanabnormalityThisarticlewillreviewthenormalsonographicwhenoneisnotpresent.However,thedegreeofabnor-appearanceoftheplacentaandsomeanatomicvariantsmality,aswellastheclinicalimplica
3、tionsofthe?ndings,inadditiontoillustratingvariouscommonpathologi-mustbeunderstoodtohelpguidemanagementofthepregnancy.Thisarticlereviewsthenormalsonographiccalconditionsoftheplacenta.Wewillfocusonappearanceoftheplacentaandsomeanatomicvariants,insonogra
4、phic?ndings,supplementingwithMRIasadditiontoillustratingvariouscommonpathologicalcon-appropriate,andcorrelateimaging?ndingswithgrossditionsoftheplacentaandcorrelatingwithgrosspatho-pathologicandhistologicspecimens.Inkeepingwithlogicandhistologicspecim
5、ens.obstetricalconvention,datesaregiveninmenstrualweeks(timefromthe?rstdayofthelastmenstrualTheplacentaisthecentralsupportorganfortheperiod).developingfetus,servingasthesiteofmaternalfetalexchangeofoxygen,carbondioxide,andnutrition.PlacentalEmbryology
6、Additionally,theplacentasecretesvarioushormonesTheplacenta,inadditiontothechorionandamnion,isandprostaglandinsthataffectphysiologicchangesformedfromthetrophoblasticlayerofcellsoftheduringpregnancy.blastocyst,thecysticmassformedfromcelldivisionCarefule
7、valuationoftheplacentaisanessentialandgrowthofthezygote.Clefts(lacunae)appearincomponentofacompleteprenatalsonographicexam-theproliferatingtrophoblastaroundpostovulatoryinationasabnormalitiesoftheplacentacanhaveadays10to13,formingtheintervillousspace.
8、Mesen-directeffectonfetaloutcome,obstetricalmanage-chymeandbloodvesselsthenformthevilli,whichment,andfuturefertility.Recognitionofplacentalbranchandgrowasthechorionfrondosum.By28variantsorinsigni?cant?ndingsisimportantsoasnotdays,theblastocyst
