Phase III clinical trial - Sein Métastatique
The reason for this trial is to compare DS-8201a to other treatments being used for HER2-low breast cancer that has spread to other parts of the body.;DS-8201a is a new medicine for breast cancer that has not been approved yet by the Food and Drug Administration. It is made of a drug and an antibody.;Each participant has a 2 out of 3 chance of receiving the new medicine.