Hello, George, and welcome to HW. Some of the guys who are more knowledgeable about
TRT my chime in soon; I'll just say that there has been some controversy re its effect.
My recommendation before you do a biopsy would be to (1) get a PHI test
www.ncbi.nlm.nih.gov/pmc/articles/PMC3943368/ and (2) consider a course of antibiotics to see if an infection may be the cause of your increase. Also, bike riding or sex within 48 hours of your PSA test may have caused some of the increase. Once you have done 1 and 2 above, get another PSA test in a couple of months then go from there.
Jim