Q: Rising PSA test Levels Without Symptoms and Normal Biopsy, What causing the climb in numbers?

My fiancé’s last results over a span of 3 years (maybe a little longer) have gone from 2 to 8. He’s had a ultrasound and a biopsy and both were negative. He doesn’t have any symptoms. He’s 52.

His Dr. is recommending the more invasive biopsy and told him if it’s cancer then he’d have to have his prostate removed. Aren’t there treatments to try before something that drastic?

Could something else be causing the climb in numbers?