Re: new to blog
PSA can go up from 3 things: prostate cancer, prostatitis, or benign prostatic hyperplasia (BPH). It also may increase naturally with age. A value above 4.0 has traditionally been considered a red flag, although some doctors think values above 2.5 or 3.0 should be investigated.
PSA velocity, the speed at which PSA goes up, is an important indicator. We often look at PSA doubling time. You didn't mention how quickly your PSA went up from 1.7 to 4.2. PSA density is another risk factor which takes the size of your prostate into account. % Free PSA is another blood test that may indicate risk. There is another test, PSA3, that is not widely available in the US.
If you want to read more about PSA, try this website: