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Yes it is worse… much!
Great question, @faye. The PD-L1 test is done to see if a patient might benefit from immunotherapy treatment that blocks the PD-L1 proteins from disguising cancer cells. You can read more about PD-L1 proteins and immunotherapy here: https://bladdercancer.net/treatment/immunotherapy/.I'm not sure how long the test has been in existence. Because it…