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Objective: We evaluated PSA as a predictor of biological behavior of prostate cancer by comparing it with Gleason score. Methodology: We retrospectively studied 105 prostate cancer patients with mean age of 69.61years (range=53-90). Seventy-four patients had Gleason score of ≤7 (70.5%) while 31 had Gleason of >7 (29.5%). Fifty patients had PSA between0.1-20 ng/ml (47.6%), 25 had between 20.1-50ng/ml (23.8%) while 30 had >50ng/ml (28.6%). Results: Median PSA in patients with Gleason ≤7 group was 18.46ng/ml compared to 61.60ng/ml in Gleason >7group. 54% patient in Gleason ≤7 group had PSA between 0.1-20, 28.4% had between 20.1-50, 17.6% had >50 compared to 32.3%, 12.9% and 54.8%, respectively in Gleason >7 group. Conclusion: High PSA is directly associated with high Gleason score and can be used to predict the presence of high grade prostate cancer.

Durre Shohab, Mohammad Athar Khawaja, Mohammad Imran Jamil, Asad Ur Rehman, Saeed Akhter. (2014) Prostate specific antigen (PSA) as a predictor of biological behavior of prostate cancer, , Volume-39, Issue-4.
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