Trisomy 21 laattin Kacar, MD, Ender Birgul, MD, Özcan Yilmaz, MD, Kadir Yaman, MD Article Published: May 23, 2006 Balikesir, Turkey This is a 18 week fetus with trisomy 21 (47XX + 21). Note the borderline ventriculomegaly measuring 10mm. Note the echogenic focus and the normal hand (there is no fifth brachymesophalangia)   Discussion Board Start a discussion about this article Add bookmark Bookmarked