Keywords: CHILD syndrome; CHILD, Congenital hemidysplasia with ichthyosiform nevus and limb defects; CNS, central nervous system; NSDHL, NAD(P) dependent steroid dehydrogenase-like gene; SHH, sonic hedgehog hormone; X-linked dominant; congenital hemidysplasia with ichthyosiform nevus and limb defects syndrome; congenital nevus; erythema; genodermatosis; hemidysplasia; limb defect; scaling.