This phase II trial studies how well autologous tumor infiltrating lymphocytes (LN-145) and pembrolizumab work in treating patients with transitional cell cancer that cannot be removed by surgery or has spread to other places in the body and have failed cisplatin-based chemotherapy. LN-145 is made up of specialized immune cells called lymphocytes or T cells that are taken from a patient's tumor, grown in a manufacturing facility and infused back into the preconditioned patient to attack the tumor. Immunotherapy with monoclonal antibodies, such as pembrolizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Giving LN-145 may help control transitional cell bladder cancer when given together with pembrolizumab
Phase 2 Study of Autologous Tumor Infiltrating Lymphocytes (LN-145) with Pembrolizumab, in Subjects Who Have Failed Cisplatin-based Chemotherapy with Locally Advanced (Unresectable) or Metastatic Transitional Cell Cancer (TCC) of the Urothelium
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