In order to stage prostate cancer, a staging system is used called the TNM system. The TNM system is used to describe how far the cancer has spread within the prostate gland or body. The TNM system is based on a few key pieces of information including the T category, which is the extent of the primary tumor, the N category, which determines whether the cancer has spread to nearby lymph nodes, the M category, which is determines the absence or presence of distant metastasis, as well as the PSA level and the Gleason score.
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