Why wasn’t Joe Biden’s ‘aggressive’ prostate cancer spotted sooner? Experts weigh in [Video]

The late-stage cancer diagnosis of former U.S. president Joe Biden has some medical professionals wondering how the disease was able to go undetected when his health had been under intense scrutiny near the end of his presidency.

In a statement on Sunday, Biden’s office said the 82-year-old has been diagnosed with prostate cancer and that it’s spread to the bone. He was diagnosed with Stage 4 cancer, which is considered to be the most advanced.

Prostate cancer cells are usually graded on a scale of 1 to 10 under the Gleason system.

This grading system involves looking at cells under a microscope and measuring how abnormal they are and their likelihood of spread. The higher the grade, the more aggressive the cancer.

According to Biden’s office, he scored a 9, which would suggest that his cancer is among the most “aggressive.”

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