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Download A case of persistent hyperplastic primary vitreous
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15thWorldCongressinFetalMedicine Acaseofpersistenthyperplasticprimaryvitreous DağlarHK,TürkmenGG,SanhalCY,KirbasA,TimurH,KaraÖ,YılmazZ,DanismanN ZekaiTahirBurakMaternityHospital,Ankara,Turkey Objective Persistenthyperplasticprimaryvitreousalsoknownaspersistentfetalvasculatureisararedevelopmentalmalformationoftheeyethatresultfromfailureofinvolutionofthe hyaloidartery.Hyaloidarterycanbeseenonultrasonographicexaminationuptothe30weeksofgestationalage.Thisisthetimethatconversionoftheprimaryvitreousto maturesecondaryvitreousiscompleted. Methods It can be present in three forms: purely anterior, purely posterior and a combination of both.Approximately 90% of cases are unilateral and sporadic but also autosomal recessivepatternofinharitancehasbeenreported. Results A 25-year-old primigravida woman was referred to our department at 22 weeks' gestation for ultrasound evaluation because of ventriculomegaly on routine ultrasound examination.Hermedicalhistorywasunremarkableexceptconsanguinity.Shewasmarriedwithherfirstcousin.Downsyndromescreeningtestshadnotbeenperformed. TORCHprofilewasnormal.Ourultrasoundexaminationrevealedsevereventriculomegaly.Amniocentesiswasoffered;buttheparentdeclinedanyfurtherevalution.At37 weeksshewasreevaluatedviaultrasoundexamination.Hydrocephalywaspresent.Examinationoftheeyeshowedpersistenthyperplasticvitreous.Thebabywasdelivered atterm.Sixhoursafterdeliverythebabydied. Conclusion Hyaloid artery should not be identified on ultrasound examination past 30 weeks gestation. Bilateral persistent hyperplastic primary vitreous is frequently associated with trisomysyndromesandotherformsofabnormalbraindevelopment.Whenabrainabnormlitiyisdetected,fetaleyesshouldbeexaminedthoroughly.
