Cincinnati Children's Hospital Medical Center Feb 20 2026 For many people diagnosed with cancer, treatment with immune checkpoint inhibitors (ICIs) has dramatically extended lives. Some of these treatments, such as Keytruda and Opdivo, have become familiar brand names.  However, for some patients, ICI cancer treatment also can prompt the immune system to attack heart tissue-a potentially lethal side effect.  Now, scientists at Cincinnati Children's report discovering a way to dramatically