Ichthyosis, Congenital, Autosomal Recessive 13, also known as arci13, is related to ichthyosis, congenital, autosomal recessive 1. An important gene associated with Ichthyosis, Congenital, Autosomal Recessive 13 is SDR9C7 (Short Chain Dehydrogenase/Reductase Family 9C Member 7). Affiliated tissues include skin, and related phenotypes are hypergranulosis and ichthyosis