Cancer survivors often go through hell to earn the prize of simply returning to a somewhat normal life — none more so than children. But even after the cancer is gone, many young patients are still at risk for another kind of medical difficulty.

Endocrine disorders, a class of issues characterized by hormone imbalances and including hyperthyroidism and metabolic disorders, are far more common among those who have survived cancer, two papers published late last month show. Ironically, it’