What does it mean for Biden’s prostate cancer to be ‘aggressive’? A urologic surgeon explains

Former President Joe Biden has been diagnosed with an “aggressive” form of prostate cancer that has spread to his bones. But what does it mean for this type of cancer to be called aggressive?

As a urologic surgeon who specializes in diagnosing and treating prostate cancer, I often explain to my patients that aggressiveness isn’t based on a single factor. Instead, it comes from understanding how abnormal the cancer cells look, known as the tumor’s grade; how far they’ve spread,…