<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi, I am Rajendra Sonavane.My age is 42 complete. My father having prostate cancer. As per Dr. I had test PSA test on 15.03.2013 , result is 5.01. Dr. atul Soni,Aurangabad give me levoff 500 and bevon tab for 15 days. Again I test PSA on 05.04.2013. Result is 4.33. As per doctor it is normal. But in report below 4 is normal. pls advice  <response>: Hello; A common cause of raised PSA is infection in prostate. Therefor your doctor has prescribed antibiotic and your PSA is in decreasing trend after treatment. PSA is non-specific test for detection of prostate cancer. Although PSA level of 4 is taken as cutoff, no level of PSA can correctly predict whether a person has cancer or not. A person with PSA less than 4 has 15 risk of cancer, 4-10 have around 25 risk of cancer while 10 have around 67 risk. If your PSA is persistently high andor there is some abnormal finding in your rectal examination you can discuss with your doctor regarding biopsy-which is the only test that gives definitive diagnosis of cancer. Regards 