Hope this helps, I found this document yesterday: 2020 Muscle - invasive cancer treatment (MIBC).
A very recent report documented complete pathalogic responses (no tumor detected) after neadjuvant chemotherapy in 49% of MIBC patients also, in addition to chemotherapy, received the IMMUNE CHECKPOINT DRUG nivolumab (opdivio). Another 17% of patients still had tumors, but they no longer invaded the muscle.
