Immunotherapy is still in its early days, and can unleash powerful forces that are not fully understood. Patients and doctors are eager to try the treatments when other options have run out, even for cancers in which they haven’t yet been tested. Sometimes those hail-Mary efforts work. But they can backfire. Here, doctors reported on three patients that got worse instead of better after taking nivolumab for a rare cancer. 

 

Photo by Marcelo Leal on Unsplash