Gleason score

What is the Gleason score?

The Gleason score is the histologic grading system of choice for prostate cancer, which is important for determining patient prognosis. A Gleason score of ≤6 corresponds to a well-differentiated tumor, which portends a good prognosis; a Gleason score of 7 corresponds to a moderately differentiated tumor, which is associated with an intermediate prognosis; and a Gleason score of 8 to 10 corresponds to a poorly differentiated or undifferentiated tumor, which is associated with a worse prognosis.

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