<s>[INST] I am 78 years old and psa test results in April was 11.4. A subsequent biopsy showed the presence of cancer from 2 of the 10 samples. Since then I have had blood tests every 2 months with the following results: 6.5, 6.6 and more recently 8.9. Do I have a reason to be concerned or maybe consider radiation therapy? Thank you....Marshall Fudge [/INST] Hi, dairy have gone through your question. I can understand your concern. Your PSA level is slightly high. It can be seen in benign prostatic hyperplasia, prostatitis and prostate cancer. However, if your previous biopsy report suggest cancer then you should go for radiotherapy irrespective of your PSA level. Biopsy is the definitive test and its results are more reliable than PSA only. Consult your doctor and start treatment accordingly. Hope I have answered your question, if you have any doubts then contact me at bit.ly/ Chat Doctor. Thanks for using Chat Doctor. Wish you a very good health. </s>