Postmortem findings and prenatal diagnosis of Zellweger syndrome. Case report.

The postmortem findings of siderosis, renal cortical cysts, pachygyria, cortical heterotopia of the brain and cerebellar hypoplasia in a seven-week-old infant with craniofacial dysmorphism and hypotonia prompted the diagnosis of Zellweger syndrome. This was confirmed by analysis of very-long-chain fatty acids in blood spots from filter paper, collected in the neonatal period, and allowed first trimester diagnosis in the subsequent pregnancies.