A genodermatosis belonging to the Mendelian Disorders of Cornification (MeDOC) and characterized by generalized hyperkeratosis and scaling of the skin. The disease is recessive X-linked ichthyosis (MONDO_0010622). Also known as: Ichthyosis, X Linked, RXLI, X-linked ichthyosis, X-linked ichthyosis with steryl-sulphatase deficiency, X-linked placental steryl-sulphatase deficiency, X-linked recessive ichthyosis, XLI, ichthyosis (disease), X-linked.