What chemotherapy would you offer (if any) in a young patient after resection and radiation of a single site of metastatic PDL1 positive, triple negative breast cancer?

This is a challenging situation, as the patient is clearly at very high risk of developing other sites of metastatic disease but there is little data on the benefit of chemotherapy or immunotherapy in reducing that risk, delaying the development of metastatic disease, or improving survival. If the p...