Table IV.

Histology from autopsies of infants with classic presentation of ACDMPV

Infant	1	2	3
Age at Presentation	Birth	Birth	1 day
Age at Death	15 days	9 days	8 days
Deficient capillarization of alveoli	Extensive	Extensive	Extensive
Malposition of pulmonary veins	Extensive	Extensive	Extensive
Medial hypertrophy of small arteries and arterioles	Mild	Mild	Mild
Lobular maldevelopment	Definite	Definite	Definite
Lymphangiectasis	Diffuse, interlobular	Diffuse, interlobular	Diffuse, interlobular

Histologic assessment focused on areas of congested, noncollapsed lung, in which architecture and capillaries were well visualized.