Studies in neural tube defects II. Pathologic findings in a prospectively collected series of anencephalics

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Abstract
This report presents the pathologic anatomy of a prospectively collected series of 36 anencephalic infants. This series provides an opportunity to investigate the epidemiology of organ system pathology in anencephaly (AN) as well as other facets of its natural history. AN infants had a mean gestational age 2.5 weeks younger than normal controls, though birthweight was normal for gestational age. Nearly 1/3 of the liveborn infants with AN died within 15 minutes, 2/3 within 3 hours; 3 AN infants survived to 48 hours. Details and discussions of the pathologic findings and their physiologic significance are presented. Regarding those AN infants who received detailed neurologic examinations, correlations are made between the brain pathology and neurologic function prior to death.