Roberts-SC phocomelia syndrome (RBS) is a rare autosomal recessive disorder clinically characterized by prenatal-onset growth retardation that continues in the postnatal period, extremity malformations, craniofacial anomalies, impaired intellectual development, and cardiac and renal anomalies. Prenatal-onset growth retardation may be mild to severe. The upper limbs are more affected than the lower limbs, where variations from tetraphocomelia (symetrical limb reduction) to hypomelia arising from mesomelic shortness are seen. Elbow and knee contractures, reduction in the number and length of fingers, thumb aplasia and hypoplasia, and clinodactyly may also be observed. Severely affected patients may die during pregnancy or the neonatal period, whereas slightly affected patients will reach adulthood. [From OMIM]