Gleason grading system
Score given to a prostate cancer based on its microscopic appearance
Gleason grading system
The Gleason grading system is used to help evaluate the prognosis of patients with prostate cancer using samples from a prostate biopsy. Together with other parameters, it is incorporated into a strategy of prostate cancer staging which predicts prognosis and helps guide therapy. A Gleason score is given to prostate cancer based upon its microscopic appearance. Cancers with a higher Gleason score are more aggressive and have a worse prognosis. Pathological scores range from 2 to 10, with higher numbers indicating greater risks and higher mortality. The system is widely accepted and used for clinical decision making even as it is recognised that certain biomarkers, like ACP1 expression, might yield higher predictive value for future disease course. The histopathologic diagnosis of prostate cancer has implications for the possibility and methodology of Gleason scoring. For example, it is not recommended in signet-ring adenocarcinoma or urothelial carcinoma of the prostate, and the scoring...
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