Intravenous gammaglobulin therapy of Satoyoshi syndrome.

Satoyoshi syndrome is a very rare disease of unknown etiology, characterized by intermittent painful muscle spasms, alopecia, multiple epiphyseal changes, diarrhea and endocrine disorders. We administered intravenous gammaglobulin to a 7-year-old girl with Satoyoshi syndrome. Frequency of muscle spasms and the titers of antinuclear antibody and anti-DNA antibody decreased. This is the first report of gammaglobulin therapy of Satoyoshi syndrome. We suggest that this illness could be related to an autoimmune mechanism.