Carpal tunnel syndrome in radial dysplasia

We treated three patients for carpal tunnel syndrome which developed more than 10 years after reconstructive surgery for radial dysplasia. All responded to decompressive surgery. The radial carpal bones were hypoplastic in all cases, and in two we measured the carpal tunnel with computed tomography (CT). This showed that the anteroposterior diameter and cross-sectional area of the carpal tunnel were small because of the hypoplasia of the carpal bones. We believe carpal tunnel syndrome occurs with radial dysplasia because of the narrow anteroposterior diameter and small cross-sectional area of the carpal tunnel.