[Left inferior vena cava. Ultrasonic diagnosis].

A case of left infrarenal vena cava is detected by ultrasonography and confirmed inferior cavography. Embryogenesis of the inferior vena cava aids understanding of this type of congenital anomalies. Ultrasonographic diagnosis is based on the absence of right infrarenal vena cava, the presence of a vascular structure left to the abdominal aorta an a normal hepatic segment of inferior vena cava.