Gestational Trophoblastic Neoplasia · Choriocarcinoma: This cancerous tumor forms inside a pregnant woman's uterus. · Invasive mole: Trophoblast cells form an ...SkipNavigationCOVID-19UpdateDuetointerestintheCOVID-19vaccines,weareexperiencinganextremelyhighcallvolume.Pleaseunderstandthatourphonelinesmustbeclearforurgentmedicalcareneeds. WeareunabletoacceptphonecallstoscheduleCOVID-19vaccinationsatthistime.Whenthischanges,wewillupdatethiswebsite.Ourvaccinesupplyremainslimited. ReadallCOVID-19VaccineInformation.PatientCareOptions|VisitorGuidelines|CoronavirusInformation|Self-Checker|GetEmailAlertsHealthHomeConditionsandDiseasesGestationalTrophoblasticDiseaseFacebookTwitterLinkedinPinterestPrintWhatYouNeedtoKnowGestationalTrophoblasticDisease(GTD)Gestationaltrophoblasticdiseaseisthenamegiventoagroupoftumorsthatformduringabnormalpregnancies.GTDisrare,affectingaboutoneinevery1,000pregnantwomenintheU.S.WhilesomeGTDtumorsaremalignant(cancerous)orhavethepotentialtoturncancerous,themajorityarebenign(noncancerous).ManywomentreatedforGTDcangoontohavenormal,healthypregnanciesinthefuture.Whatisgestationaltrophoblasticdisease?Gestationaltrophoblasticdisease(GTD)isthetermgiventoagroupofraretumorsthatdevelopduringtheearlystagesofpregnancy.Afterconception,awoman’sbodypreparesforpregnancybysurroundingthenewlyfertilizedeggorembryowithalayerofcellscalledthetrophoblast.Thetrophoblasthelpstheembryoimplantitselftotheuterinewall.Thesecellsalsoformalargepartofthetissuethatmakeuptheplacenta—theorganthatsuppliesnutrientstoadevelopingfetus.InGTD,thereareabnormalchangesinthetrophoblastcellsthatcausetumorstodevelop.MostGTDtumorsarebenign(noncancerous),butsomehavethepotentialtoturnmalignant(cancerous).GTDisusuallyclassifiedintooneoftwocategories:HydatidiformmolesGestationaltrophoblasticneoplasia(GTN)HydatidiformMolesAhydatidiformmoleisalsoknownasamolarpregnancy.Inamolarpregnancy,thereisaproblemwiththefertilizedegg,andthereisanoverproductionoftrophoblasttissue.Thisexcesstrophoblasttissuegrowsintoa