2003-11-11-16 Trisomy, 18 © Larrazábal www.thefetus.net/
Trisomy 18, 3D rendering
Natasha Larrazábal, MD, Yelice Castro MD.
Sonography Unit Military Hospital “Carlos Arvelo”. Caracas-Venezuela.
This 35-year-old patient was first scanned at 12 weeks and we suspected some anomalies since we could no insonate the ductus venosus.
Patient refused the amniocentesis and had a triple screening at 15 weeks. The sonography at 17 weeks showed:
Choroid plexus cysts:
Congenital diaphragmatic hernia:
Agenesis of the ductus venosus. We suspected type 5 for the presence of a large inferior vena cava:
And persistent pulsatility of waveform umbilical vein:
Single umbilical artery:
Polihydramnios was observed:
We suspected for findings associated trisomy 18 and pregnancy was interrupted at 19 weeks, the final karyotype report: