An 11 ~-year-old boy, born of a consanguineous marriage, had mental retardation, painful plantar and palmar keratosis, and dendritic keratitis associated with tyrosinemia, p-hydroxyphenylpyruvicaciduria, p-hydroxylaeeticaciduria, and p-hydroxyphenylaceticaciduria. Liver and renal functions were within normal ranges, and vitamin C loading did not correct the metabolic abnormalities. Maintenance ...
