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1、ThePlacentaRevisited:Radiologic–PathologicCorrelationaabJeffreyP.Kanne,MD,TasneemA.Lalani,MD,andCorinneL.Fligner,MDTheplacentaisthecentralsupportorganforthedevelopingreservedforevaluatingconditionssuchasplacentafetus.Recognitionofplacentalvariantsandi
2、nsignificantincretaorplacentalabruption.findingsisimportantsoasnottosuggestanabnormalityThisarticlewillreviewthenormalsonographicwhenoneisnotpresent.However,thedegreeofabnor-appearanceoftheplacentaandsomeanatomicvariantsmality,aswellastheclinicalimplica
3、tionsofthefindings,inadditiontoillustratingvariouscommonpathologi-mustbeunderstoodtohelpguidemanagementofthepregnancy.Thisarticlereviewsthenormalsonographiccalconditionsoftheplacenta.Wewillfocusonappearanceoftheplacentaandsomeanatomicvariants,insonogra
4、phicfindings,supplementingwithMRIasadditiontoillustratingvariouscommonpathologicalcon-appropriate,andcorrelateimagingfindingswithgrossditionsoftheplacentaandcorrelatingwithgrosspatho-pathologicandhistologicspecimens.Inkeepingwithlogicandhistologicspecim
5、ens.obstetricalconvention,datesaregiveninmenstrualweeks(timefromthefirstdayofthelastmenstrualTheplacentaisthecentralsupportorganfortheperiod).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.By28variantsorinsignificantfindingsisimportantsoasnotdays,theblastocyst