Caudal Regression Syndrome
You are reading a NORD Rare Disease Report Abstract. NORD’s full collection of reports on over 1200 rare diseases is available to subscribers (click here for details). We are now also offering two full rare disease reports per day to visitors on our Web site.
NORD is very grateful to Frank Chervenak, MD, Department of Obstetrics and Gynecology, Weill Medical College of Cornell University, for assistance in the preparation of this report.
Synonyms of Caudal Regression Syndrome
- Caudal Dysplasia
- Caudal Dysplasia
- Caudal Dysplasia Sequence
- Sacral Agenesis, Congenital
- Sacral Regression
- No subdivisions found.
Caudal regression syndrome is a broad term for a rare complex disorder characterized by abnormal development of the lower (caudal) end of the spine. The spine consists of many small bones (vertebrae) that collectively form the spinal column. The spinal column is generally broken down into three segments – the cervical spine, consisting of the vertebrae just below the skull; the thoracic spine, consisting of the vertebrae in the chest region; and the lumbar spine, consisting of the vertebrae of the lower back. A triangularly-shaped bony structure called the sacrum joins the lumbar portion of spine to the pelvis. The sacrum consists of five vertebrae fused together. At the end of the sacrum is the tailbone (coccyx). A wide range of abnormalities may potentially occur in infants with caudal regression syndrome including abnormal development (agenesis) of the sacrum and coccyx and abnormalities of the lumbar spine. More severe malformations may occur in some cases. Abnormalities of the lower spine can cause a variety of additional complications including joint contractures, clubfeet and disruption or damage of the end of the spinal cord may occur, potentially causing urinary incontinence. Additional anomalies of the gastrointestinal tract, kidneys, heart, respiratory system, upper limbs and upper portions of the spine can also occur. The exact cause of caudal regression syndrome is unknown. Both environmental and genetic factors are suspected to play a role in the development of the disorder.
Some sources in the medical literature classify a condition called sirenomelia as the most severe form of caudal regression syndrome. However, recently many researchers have indicated that sirenomelia is a similar, but distinct, disorder. NORD has a separate report on sirenomelia.
Caudal Regression Syndrome Resources
The information in NORD’s Rare Disease Database is for educational purposes only. It should never be used for diagnostic or treatment purposes. If you have questions regarding a medical condition, always seek the advice of your physician or other qualified health professional. NORD’s reports provide a brief overview of rare diseases. For more specific information, we encourage you to contact your personal physician or the agencies listed as “Resources” on this report.
The National Organization for Rare Disorders (NORD) web site, its databases, and the contents thereof are copyrighted by NORD. No part of the NORD web site, databases, or the contents may be copied in any way, including but not limited to the following: electronically downloading, storing in a retrieval system, or redistributing for any commercial purposes without the express written permission of NORD. Permission is hereby granted to print one hard copy of the information on an individual disease for your personal use, provided that such content is in no way modified, and the credit for the source (NORD) and NORD’s copyright notice are included on the printed copy. Any other electronic reproduction or other printed versions is strictly prohibited.
Copyright 1992, 2000, 2013
NORD's Rare Disease Information Database is copyrighted and may not be published without the written consent of NORD.