Joe Biden's prostate cancer diagnosis reveals a high Gleason score, indicating aggressive cancer. Dr. Arpeet Shah and Dr. Nicole Saphier comment on what this means for prognosis.

Joe Biden’s metastatic prostate cancer diagnosis, coupled with revelations about his decline in recent years, has renewed chatter and anxiety about the former president’s health.

Some Americans say they don’t understand how former President Joseph R. Biden Jr. could have only recently learned that he had an aggressive form of prostate cancer that had already spread to his bone...