A trial of nivolumab before and after surgery for breast cancer (CheckMate 7FL)

This trial is looking at adding nivolumab to chemotherapy and comparing it to chemotherapy alone before surgery. It is also looking at adding nivolumab to hormone therapy and comparing it to hormone therapy alone after surgery.

It is open to people who have newly diagnosed breast cancer. And who have cancer that:

• has large amounts of hormone receptors (ER positive cancer) and

• a small number of receptors for HER2 (HER2 negative cancer)