NSDHL and interstitial lung disease specific to childhood: The CHILD (congenital hemidysplasia with ichthyosiform nevus and limb defects) syndrome is an X-linked dominant multisystem MeDOC caused by mutations in the NSDHL (NAD(P)H steroid dehydrogenase-like protein) gene, which is involved in the distal cholesterol biosynthetic pathway [7].