Unusual case of progressive systemic sclerosis with onset in early childhood and following infectious mononucleosis.

A rare case of infantile progressive systemic sclerosis is reported. A Japanese girl suffered from infectious mononucleosis at the age of 1 year 3 months, and 5 months later she developed edema and sclerosis of the skin. She has been followed up for 4 years and now has grotesque features, with contractures of hands and feet due to advanced systemic sclerosis. The relationship between infectious mononucleosis and progressive systemic sclerosis is discussed.