GROK:

Prostate cancer is typically staged from 1 to 4, with Stage 4 being the most advanced. There is no "Stage 9" in the standard staging systems (like TNM or AJCC) for prostate cancer. You might be referring to a misunderstanding a different cancer type, or perhaps a non-medical grading system. Here's a quick breakdown of prostate cancer staging for clarity:

Stage 1: Cancer is small, confined to the prostate, and grows slowly.

Stage 2: Cancer is still within the prostate but larger or more aggressive.

Stage 3: Cancer has spread beyond the prostate to nearby tissues.

Stage 4: Cancer has metastasized to distant organs (e.g., bones, lymph nodes).

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