psa in early diagnosis of prostate cancer

we report our experience with 124 patients were referred 70 our urology clinic in sina hospital for urinary retention. serum psa analyzed by using a monoclonal assay. all patients underwent digital rectal examination. the patients devided in 3 groups: group 1 (87 men) with a serum psa level less than 4 ng/ml, group 2 (26 men) with a serum psa level 4-10 ng/ml and group 3 (11 men) with a serum psa level greater than 10 ng/ml. after prostate biopsy and trans urethral resection or open prostatectomy, of the 87 men in group 1, one man had cancer of the prostate, of the 26 men in group 2, 2 men had cancer of the prostate and of the 11 men in group 3, 9 men had prostate cancer.