Possible clinical and histologic manifestations of adult-onset type II citrullinemia in early infancy.

We describe 2 patients with adult-onset type II citrullinemia who developed transient hypoproteinemia and jaundice in early infancy. Liver histology showed a marked fatty change and fibrosis. After the patients had lived without symptoms to the ages of 5 and 16 years, respectively, the diagnosis was made by genetic analysis.