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Bladder CancerNovember 2024Summary reviewed September 2026

Drug Combo Shrank Tumors in Over Half of Bladder Cancer Patients

For bladder cancer patients who can't tolerate standard chemotherapy, a two-drug combination shrank tumors in 54% of people. The drugs targeted two different systems — one blocking cancer growth signals, the other helping the immune system fight the cancer. Most patients who responded had tumors that normally don't respond well to immunotherapy alone.

What the trial was testing

The FORT-2 enrolled 37 patients with bladder cancer. The study was sponsored by Bayer and tracked outcomes across the full group of patients who matched the trial's eligibility profile.

It was an early-stage trial — researchers are still confirming safety and getting an early look at how well the treatment works. Trials at this stage are designed to produce evidence regulators and physicians can act on — not just observations to follow up later.

What the results showed

Over half of patients saw their bladder cancer shrink with this two-drug combination.

JAMA oncology · 2024 · NCT03473756

These findings — that had their bladder cancer tumors shrink with the two-drug combination — were published in the JAMA oncology and represent the headline result of the study.

Researchers tracked outcomes across 37 patients enrolled in the trial. The result was consistent enough across the group that the team felt confident reporting it.

What this means for patients

For patients with bladder cancer, this result changes the calculus on what to ask their care team about. Whether it changes day-to-day care depends on factors like disease subtype, prior treatments, and where the patient is in their care journey.

What you can do now

This combination showed promise for bladder cancer patients who can't have standard chemotherapy. The drugs worked well even in people whose tumors don't usually respond to immunotherapy. This was an early-stage study and the combination is not yet FDA-approved. Ask your doctor about open trials or related approved options.

Eligibility for the treatments mentioned above depends on specific test results and clinical history. Bring this summary, the trial name, and your most recent labs or pathology report to your next visit.