elastosis is also associated with aortic stenosis. Calcified aortic stenosis, important in adults, is hardly ever seen in children. Congenital aortic stenosis may also be associated with non-cardiac abnormalities in certain genetic syndromes; for example, Marfan's syndrome and von Recklinghausen's disease*. Supravalvar stenosis has recently been reported as part of a stenosis in which there is also mental retardation and a characteristic facial appearance (Beuren, Apitz, and Harmjanz, I962). Aortic stenosis has been found associated with idiopathic hypercalcaemia in children. Black and Bonham Carter (I963) have presented several examples of aortic stenosis associated with the facies of severe infantile hypercalcaemia. The incidence of congenital heart disease among all live births probably approaches i % (Richards, Merritt, Samuels, and Langmann, i955), and the incidence of aortic stenosis among all cases of congenital heart disease is about 3 % (Wood, I956; Keith et al., I958); therefore approximately I in 3,000 tO I in 4,000 live births have aortic stenosis.
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