Three cases of recurrent generalized muscle spasms in China.

Three cases of recurrent generalized muscle spasms were reported. All three cases are of Chinese descent and show some typical features of recurrent painful muscle cramps, alopecia, diarrhea and abnormalities of bone and endocrine systems. Recurrent generalized muscle spasms or Satoyoshi's disease is recognized as an entity of the disease not only in Japan but also in China. The result that one of the three cases is associated with myasthenia gravis might suggest an immunological abnormality as a mechanism of the disease.