First of all, welcome. Secondly, I’m sorry to hear of the recent loss of your father to advanced PC.
Thirdly, congratulation for “failing” the PSA test. It’s good that you got an initial baseline number, but the result is indeed low and (generally) favorable. Start keeping records of all your test results, and make sure that the test methodology is consistent from test-to-test because different test manufacturers use different methods, and results cannot be meaningfully compared across different methodologies. Note that one thing to continually watch is the change (PSA velocity) in the test results.
The PCA3 result is a bit troubling. The most common use of PCA3 is for men in the “gray area” of PSA results between 2.5 and 10.0 ng/mL (to help determine whether to go forward with needle biopsy), which is much higher than you, or for men with low PSA but a positive DRE (you did not indicate that yours was positive). Men with a family history and low PSA (like you) is, however, another use of PCA3 although there is no scientific evidence supporting the use of the assay in this subject population.
Your doctor said “you have no choice” (about moving to a biopsy), and although I am not a doctor and can only give patient-to-patient wisdom & inputs, I think you do have a choice for a less invasive procedure before undertaking the larger step to needle biopsy, or likely saturation biopsy in your case.
Before further discussing your possible alternative, you should know that the biopsy is not definitive in ruling out cancer. If they find cancer, it is definitive, but if they do not, it only means that their sampling did not find cancer…it may or may not still be present.
The alternative I mentioned above is called the color Doppler ultrasound biopsy. This technique uses imaging on new blood vessel growth to help locate and estimate the size, shape and location of PC. While I never had the procedure, there are others here who might also respond to this thread on their patient-to-patient input about this. Either way, I would suggest discussing this with your urologist.
I hope this helps…