Scleroderma-like skin lesions in two patients with phenylketonuria.

Two patients with phenylketonuria and scleroderma-like skin lesions are presented. Since scleroderma is a rare collagen disease of childhood, the occurrence of these two disorders in the same patient does not seem to be coincidental but raises the possibility of a causal relationship. Improvement in the skin lesions of the patients after the commencement of a low-phenylalanine diet supports this hypothesis.