
Caudal regression syndrome (caudal dysplasia sequence) is characterized by complete or partial agenesis of the sacral and lumbar vertebrae, along with pelvic deformity. Multiple other anomalies-including femoral hypoplasia; clubbed feet; flexion contractures of the lowerextremities; GI, genitourinary, and heart abnormalities; and neural tube defects-may also be associated with the syndrome.1
