Many prostate cancers are less than full on aggressive.

The Gleason score is an indicator of how slowly or quickly the cancer may spread.

1B is a very low indicator.

Urologists/oncologists usually will recommend that the patient assess all potential treatments in consideration of other major health conditions.

Often the prostate cancer's growth may be so slow that another more serious illness is expected to end life way before the prostate cancer might.

imo, best to consult second and even third oncology/urology specialists before committing to any treatment.

And, frankly, surgical options should be among the last courses of treatment considered.

Less invasive treatment, for example, should be the early options, especially if there is no family history of prostate cancer.

webmd.com has some very good explanations/discussions imo.

Stay upbeat and best of luck in beating the beast.