Seckel Syndrome 4, also known as sckl4, is related to microcephaly, autosomal dominant and microcephaly 16, primary, autosomal recessive. An important gene associated with Seckel Syndrome 4 is CENPJ (Centromere Protein J), and among its related pathways/superpathways are Cell Cycle, Mitotic and Loss of Nlp from mitotic centrosomes. Related phenotypes are microcephaly and intrauterine growth retardation