Lumbo-sacral agenesis or rumplessness.
D000328:Adult; D002675:Child, Preschool; D003050:Coccyx / Q000002:abnormalities; D000013:Congenital Abnormalities / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D007223:Infant; D008159:Lumbar Vertebrae / Q000002:abnormalities; D008161:Lumbosacral Region / Q000002:abnormalities* / Q000000981:diagnostic imaging; D009461:Neurologic Manifestations; D011859:Radiography; D012447:Sacrum / Q000002:abnormalities