1. Caudal duplication syndrome;Dominguez;Am J Dis Child,1993
2. Duplication of the entire colon, bladder and urethra;Ravitch;Surgery,1953
3. Duplication and vesicointestinal fissure;Smith;Birth Defects (Original Article Series),1988
4. Intestinal duplications;Aiken,2004
5. Sacral agenesis and caudal spinal cord malformations;Pang;Neurosurgery,1993