Trisomy 21 Alaattin Kacar, MD; Özcan Yilmaz, MD. Article Published: Apr 29, 2008 Balikesir, Turkey. Here are some images showing several associated anomalies found in a fetus with trisomy 21 obtained at 20th week of pregnancy. Images 1, 2: The images show mild cerebral ventriculomegaly. Images 3, 4: Hands of the fetus with brachymesophalangia and clinodactyly of the 5th digit.. Images 5, 6: Mild fetal pyelectasis. Image 7: The nasal bone was normal.  Discussion Board Start a discussion about this article Add bookmark Bookmarked