“Last week, President Joe Biden was seen for a new finding of a prostate nodule after experiencing increasing urinary symptoms,” his personal office said in a statement. “On Friday he was diagnosed with prostate cancer, characterized by a Gleason score of 9 (Grade Group 5) with metastasis to the bone.”

Scott Adams, the cartoonist who created the comic strip “Dilbert,” said on his podcast on Monday that he had the same kind of aggressive prostate cancer as former President Joseph R. Biden Jr., and t...