Androgen deprivation therapy (ADT)

The answer to a question three individual trials could not answer on their own, and the reason docetaxel with androgen deprivation became standard for metastatic hormone-sensitive disease. It also stopped a widely used bone drug being credited with a survival effect it does not have.

A negative trial that was later overturned, and a standing argument for pooling individual trials rather than acting on the first one to report. It is also the reason the distinction between high-volume and low-volume metastatic disease is written into guidelines.

The reason intermittent androgen deprivation is offered as a choice in metastatic disease rather than recommended, and a case study in what an inconclusive non-inferiority trial should say. For a man weighing the side effects, the honest statement is that the quality-of-life gain is real but brief and the survival question is open.

The design specification for the second-generation antiandrogens. A drug for castration-resistant prostate cancer has to stay an antagonist when the receptor is abundant, which is what enzalutamide, apalutamide and darolutamide were engineered to do and what bicalutamide fails to do.

The first evidence that resistance to hormone therapy in prostate cancer is an adaptation of the target rather than an escape from it, which is why the field kept building better androgen receptor drugs instead of abandoning the pathway.

The origin of hormone therapy for cancer, and the reason prostate cancer is treated by taking something away rather than adding a cytotoxic drug. More than eighty years later, every man who starts androgen deprivation is having this experiment repeated on him, and the disease is still defined by whether it has stopped responding to it.