Congenital Hemidysplasia with Ichthyosiform nevus and Limb Defects (CHILD syndrome) is a rare X-linked dominant genodermatosis caused by mutations in the NAD(P) dependent steroid dehydrogenase-like protein gene.
We report for the first time that CHILD syndrome (MIM 308050), an X-linked dominant, male-lethal trait characterized by an inflammatory nevus with striking lateralization and strict midline demarcation, as well as ipsilateral hypoplasia of the body is caused by mutations in the gene NSDHL located at Xq28 (NAD(P)H steroid dehydrogenase-like protein) encoding a 3beta-hydroxysteroid dehydrogenase functioning in the cholesterol biosynthetic pathway.