This brings up a question that I've never thought about till now...when did TRUS biopsy become commonplace, and when did G scores start coming along as diagnostic?
TRUS -- early 1990's, but typically only 6-cores then. The biopsies were done before that, but they were "finger guided" before being ultrasonically assisted.
Gleason -- developed in the 1960's, and quickly adopted as the best of several competing systems
There was little doubt that Gleason scores of prostate biopsies performed since the 1960's were assessed (otherwise, what's the point?), but a) it's very possible that the urologist never told the patient what the Gleason score was "in the old days," of b) many men of our grandfather's or father's generation treated long ago have forgotten what their Gleason score was, because it wasn't as well-known a thing as it is today, or c) our fathers didn't pass on to us what their Gleason score was