Ichthyosis, Congenital, Autosomal Recessive 4a, also known as autosomal recessive congenital ichthyosis 4a, is related to ichthyosis, congenital, autosomal recessive 1 and self-improving collodion baby. An important gene associated with Ichthyosis, Congenital, Autosomal Recessive 4a is ABCA12 (ATP Binding Cassette Subfamily A Member 12), and among its related pathways/superpathways are Keratinization and Cholesterol and Sphingolipids transport / Recycling to plasma membrane in lung (normal and CF). Affiliated tissues include Epidermis and skin, and related phenotypes are congenital nonbullous ichthyosiform erythroderma and palmoplantar keratoderma