This clinical trial is focused on studying a type of bladder cancer known as High-Risk Non-Muscle Invasive Bladder Cancer (HR NMIBC). This form of cancer affects the bladder but does not invade the muscle layer. The study is investigating the effectiveness and safety of a treatment that combines two medications: Pembrolizumab and Bacillus Calmette-Guérin (BCG). Pembrolizumab, also known by its code name MK-3475, is a medication that helps the immune system fight cancer cells. BCG is a vaccine that is used to treat bladder cancer by stimulating the immune system to attack cancer cells in the bladder.
The purpose of the study is to compare the results of using Pembrolizumab with BCG against using BCG alone in patients with HR NMIBC. Participants in the study will be divided into different groups. Some will receive the combination of Pembrolizumab and BCG, while others will receive only BCG. The study will observe how well the cancer responds to these treatments and how long patients remain free of cancer events. The study will also monitor the overall health and quality of life of the participants during the treatment period.
Participants will receive the treatments over a period of time, with regular check-ups to monitor their health and the progress of the cancer. The study aims to provide valuable information on whether the combination of Pembrolizumab and BCG is more effective than BCG alone in treating HR NMIBC. This research could lead to improved treatment options for patients with this type of bladder cancer.



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