I know people who had their prostate removed and they were told their psa numbers said cancer. There wasn't a tumor or one that affected anything. I came up on a "routine" blood test. The doctor told him it had to be removed. This was a few decades ago but that was the thinking
STILL WRONG INFORMATION----I had my Prostate Gland surgically removed 25 years ago. My PSA took a big jump from one year to the next and that triggered the need for a Biopsy which confirmed a aggressive cancer.
They were told for the best chances of the cancer or what ever fully developing they told him complete removal was the best option odds wise. He said it wasn't about a tumor/s, mass etc. The doctors kept on throwing statistics/odds at them about eliminating any cancer in the prostate, recurrance etc. Non of his functions were impaired. He was/is a professional patient type-what ever you say doc but he regrets that the most because now he has to note were a restroom is out in public like a mafia don looking for hit men in a restaurant among other things.