Thanatophoric dysplasia, type I Ghada Mahmoud Mansour, MD Article Published: May 31, 2002 Cairo, Egypt This is a 39 weeks fetus with Thanatophoric dysplasia, type I. Note the very short humerus, ulna/radius and femur and the very narrow chest compared to the abdomen. Narrow chest compared to the abdomen Humerus Ulna/radius Femur Discussion Board Start a discussion about this article Add bookmark Bookmarked