The patient was a 29-year-old Japanese woman. In February
2007, she underwent hysterosalpingography for detailed
examination of infertility. She became pregnant 4 months
later, but her pregnancy ended with a miscarriage at the gestational
age of 5 full weeks. Nine months after the miscarriage,
she became aware of palpitation, excessive sweating,
and hyperphagia, followed by finger tremor and nausea.