Immune-Stromal Landscape in Muscle-Invasive Bladder Cancer

Brief summary (registry, in English)

Bladder cancer is a significant global health issue. When the cancer spreads into the muscle layer of the bladder (muscle-invasive bladder cancer), a common treatment is the surgical removal of the bladder (radical cystectomy). However, even after surgery, it can be difficult for doctors to accurately predict how an individual patient's disease will progress using standard staging methods. This retrospective observational study aims to find better ways to predict patient outcomes by examining the tumor microenvironment, which is the environment immediately surrounding the cancer cells. Specifically, researchers are looking at the relationship between the tumor cells, the surrounding supportive tissue (the stroma), and the patient's natural immune cells. The study will review existing medical records and archived tumor tissue samples from at least 100 patients who underwent radical cystectomy at the South Egypt Cancer Institute between 2018 and 2024. Under a microscope, researchers will assess three main features: * Tumor-Stroma Ratio (TSR): The amount of tumor tissue compared to the surrounding supportive tissue. * Tumor-Infiltrating Lymphocytes (TILs): The number of immune cells that have moved into the tumor to try and fight it. * Tertiary Lymphoid Structures (TLS): Organized clusters of immune cells that form near the tumor. By analyzing these features, the researchers hope to determine if specific patterns of immune and supportive cells are linked to better or worse survival rates, such as Overall Survival and Disease-Free Survival. Understanding this immune-stromal landscape could lead to more personalized risk assessments and better treatment plans for future bladder cancer patients.

What you commit to

• Study type: Observational
• Planned participants: 100
• From May 2026 to the primary completion date, May 2027
• No sites listed in no country
• Visits and tests: ask the trial team, the registry does not list them

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Who cannot take part

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Who the study is looking for

Sex: All

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