[autosomal recessive disorder characterized by multiple congenital anomalies including microcephaly, mental retardation, unusual facies, and genital abnormalities; the biochemical defect is a lack of 7-dehydrocholesterol-delta-7-reductase, resulting in abnormally high levels of 7-dehydrocholesterol and low levels of cholesterol. ( CSP )] (UMLS (CSP) C0175694) =Congenital Abnormality; Disease or Syndrome =Abnormalities, Multiple; Lipid Metabolism, Inborn Errors; syndrome; inborn lipid/lipoprotein disorder; congenital disorder;