Table of contents
- Trial overview
- Who is being studied
- How the trials are designed
- Main endpoints
- What the trials try to show
- Key patient terms
Trial overview
Two authorised Phase 3 clinical trials are studying Hexaminolevulinate in bladder cancer surgery.[1][2] Both trials focus on non-muscle invasive bladder cancer, which means the cancer has not grown into the muscle layer of the bladder.[1][2]
These studies compare a photodynamic diagnosis approach during transurethral resection with standard white-light surgery.[1][2] The main question is whether this approach helps doctors remove more disease and reduce the need for repeat surgery.[1][2]
Who is being studied
The target population in both trials is people with non-muscle invasive bladder cancer (NMIBC).[1][2] One trial lists the condition as “Not muscular invasive bladder cancer,” and the other uses the term NMIBC.[1][2]
These studies are designed for patients who are having bladder tumor surgery and may need a second look operation later.[1][2] The second trial explains that it is trying to identify patients who could safely avoid an unnecessary repeat resection.[2]
How the trials are designed
Both studies are interventional, which means the research team assigns a treatment strategy and then measures the results.[1][2] Both are also Phase 3 studies, so they compare the research approach with standard care in larger patient groups.[1][2]
In NCT06548438, the study compares PDD during TURB with white-light cystoscopy (WLC).[1] The trial includes 300 participants and is focused on the completeness of the first tumor removal.[1]
In 2023-507307-64-00, the study compares a primary PDD-guided TURBT strategy with the standard pathway that includes white-light resection and a repeat resection when needed.[2] This trial includes 258 participants and looks at whether some patients can avoid a second operation.[2]
Main endpoints
The main endpoint in NCT06548438 is the proportion of patients with residual tumor or a new diagnosis of carcinoma in situ at the time of repeat TURB.[1] Residual tumor means cancer still found after the first surgery, and carcinoma in situ means an early flat cancer change in the bladder lining.[1]
The main endpoint in 2023-507307-64-00 is the relative proportion of patients with early bladder cancer recurrence at the first follow-up cystoscopy.[2] Early recurrence is defined differently in the two study arms because the treatment timelines are not the same.[2]
Both trials are therefore measuring how well the surgery removes visible and hidden disease, not just whether the procedure can be done.[1][2]
What the trials try to show
The first study aims to compare the completeness of TURB with PDD against TURB with white light.[1] It asks whether the PDD-guided approach leaves fewer patients with remaining tumor or upstaging at repeat surgery.[1]
The second study aims to provide strong evidence that a PDD-guided approach may be safe enough to reduce or avoid unnecessary repeat resections in selected NMIBC patients.[2] The brief summary says the investigators want to show that their approach is not oncologically inferior to standard care, meaning it should not be worse for cancer control.[2]
These studies are important because they focus on a practical question in bladder cancer care: whether better imaging during surgery can improve treatment and possibly reduce extra procedures.[1][2]
Key patient terms
TURBT is surgery through the urethra to remove a bladder tumor.[2]
Repeat resection means a second surgery after the first tumor removal to check for leftover disease.[1][2]
Follow-up cystoscopy is a later bladder check with a camera to look for cancer coming back.[2]
Standard of care means the usual treatment doctors already use in regular practice.[2]
Oncologically inferior means worse for cancer control, which the second trial aims to rule out.[2]



