Caudal Regression Syndrome

Abstract

Caudal regression syndrome (CRS), also known as caudal dysplasia syndrome, is a rare malformation that ranges from mild coccygeal to severe forms of lumbosacral and lower thoracic agenesis. Anomalies of other organ systems may also be found simultaneously. Recognition of CRS is important as the extent of abnormality and gestational age could determine the pregnancy’s outcome. Antenatal diagnosis is possible by recognizing the characteristic features on sonography. In this particular case study, a diagnosis of CRS was made during the second trimester with sonography and resulted in an adequate medical management decision. The sonographic features of CRS and its differential diagnoses are discussed in the context of this case study.