Radio-renal syndrome is a rare developmental defect during embryogenesis characterized by variable upper limb reduction defects and renal anomalies. Patients typically present absence/hypoplasia of digits, radii and/or ulnae, short stature and mild external ear malformation, as well as kidney agenesis or ectopia. There have been no further descriptions in the literature since 1983. The disease is radio-renal syndrome (MONDO_0008359).