Trisomy 18, clenched fist Sherif Derbala, MD Article Published: May 24, 2002 Cairo, Egypt These are two 3D reconstructions of the hand of a fetus with trisomy 18. The clenched fist with overlapping of the third digit by the second and the fourth by the fifth are superbly demonstrated with the 3D technique. (Kretz Combison) Discussion Board Start a discussion about this article Add to Favorites Favorite