Myoclonus, Familial, 1, also known as myoclonus, familial cortical, is related to intrauterine growth retardation, metaphyseal dysplasia, adrenal hypoplasia congenita, and genital anomalies and follicular lymphoma. An important gene associated with Myoclonus, Familial, 1 is NOL3 (Nucleolar Protein 3). Related phenotypes are action myoclonus and insomnia