A ductal aneurysm rapidly developing into coarctation of the aorta.

A newborn boy was referred to us with an aortic anomaly. Computed tomography showed a large ductal aneurysm, 14.6 mm in diameter (Fig. 1). On the 13th day, it had shrunk to a diameter of 1.6 mm (Fig. 2). Coarctations are a rare complication of ductal aneurysms. These changes took place within a short period. Figure 1: A view from the back: a large ductal aneurysm is seen. Figure 2: A view from the back: the ductal aneurysm has developed to coarc-tation of the aorta.