Retrospective prenatal diagnosis of scimitar syndrome aided by three-dimensional power Doppler imaging

Scimitar syndrome is a rare malformation of the arterial supply and venous drainage of the lung. We report the case of a fetus that presented with car diac asymmetry and malposition of the fetal heart. Postnatally, scimitar sy ndrome was confirmed at cardiac catheterization. Retrospective reconstructi on of three-dimensional power Doppler volumes, obtained during fetal life, allowed direct visualization of the abnormal aortopulmonary collateral vess el. This had not been seen on conventional scans. This case demonstrates ma ny of the strengths of three-dimensional sonographic techniques for the del ineation of complex vascular anatomy. It confirms that a prospective diagno sis of scimitar syndrome should be possible during fetal life.