Antenatal presentation of isolated femoral hypoplasia discovered at 18 weeks of gestation.

Prenatal diagnosis performed by ultrasound scan is now a routine part of antenatal care in France. A case of congenital short femur in an otherwise healthy infant is described. Antenatal diagnosis was made at 18 weeks of gestation and ultrasonic follow-up was performed. The right femur was shorter than the left. Further sonographic exploration demonstrated unilateral femoral hypoplasia without another anomaly. In this case, the occurrence of congenital short femur was sporadic. The diagnosis was confirmed after delivery. Prenatal sonographic features, differential diagnosis, prognosis and management are discussed. This case illustrates the importance of ultrasound as an early detector of certain congenital anomalies and as a useful tool in their follow-up.