In april 03, 2013 i had a prostate biopsy because of a high psa 9.0. the biopsy result was negative for cancer but the prostate is 2 times larger than?

Elevated PSA: One common cause of psa elevation is benign prostatic hyperplasia (bph). The more prostatic tissue present, the more psa it will produce. If you are having symptoms from bph, a medication to shrink the prostate such as Finasteride or Dutasteride may be beneficial.

PSA density: Can describe whether the size of your gland explains the psa. The negative biopsy says they did not find the cancer, but it can also mean they missed it. I would repeat the psa and establish a pattern. You should refrain from sex a week or 2 before repeating the psa. If the psa continues to rise, repeat the biopsies.