Confirmation of the origin of NISCH syndrome

Neonatal ichthyosis‐sclerosing cholangitis (NISCH) syndrome, a rare autosomal recessive ichthyosis syndrome characterized by scalp hypotrichosis, scarring alopecia, ichthyosis, and sclerosing cholangitis, was described for the first time in 2002. It is caused by a mutation in the gene coding for the tight junction protein claudin‐1. Only four patients carrying the same mutation of the CLDN1 gene have been described until now. We report a patient presenting with the clinical characteristics of NISCH syndrome and carrying a novel mutation in the CLDN1 gene. Hum Mutat 27(5), 408–410, 2006. © 2006 Wiley‐Liss, Inc.