How often are young children diagnosed with hyperthyroidism?

It happens, notoften: Most common reason is graves disease, usually kids 10-14, about 3/100, 000, far more girls than boys, can happen younger. Sometimes others in family may have it, not always. It can be effectively treated with medicine and close follow-up; kids often do better than adults. Also, toddlers can get into others' meds, and newborns can be affected if their moms are hyperthyroid.