Absence of the leaflets of the aortic valve in DiGeorge syndrome.

A newborn infant is described with complete absence of the leaflets of the aortic valve, interruption of the aortic arch and DiGeorge syndrome. This association has not previously been reported, nor has absence of the leaflets of the aortic valve without other features of left ventricular dysplasia. We discuss the possible influence of severe intra-uterine aortic regurgitation on development of the aortic arch.