Hi,
I specifically asked to have Dr. Epstein read the slides himself.
However, I am in agreement with Allen. The pathologists at JHU specialize in prostate pathology.
As for AS, at present you are a prime candidate with a diagnosis of very low-risk PCa. Your PSA score is still relatively low.
In my case, my PSA started climbing when I was 51 (it jumped from 1.0 to 3.4 in one year) reaching a high of 9.6 eleven years later. The only reason I did not have it treated (remember that in the early 2000s, AS was not as prevalent as it is now) was that the 3 biopsies I underwent over a period of 9 years kept coming back negative. Any radical treatment would have been a big mistake because the PCa tumors causing the PSA to climb were in my transition zone, a Gleason grade of 6, and very low tumor volume.
I am now 67 and I still have not opted for any treatment, but I have been vigilant, with semi-annual PSA tests and annual 3T mp-MRIs. If I were in your shoes, I would continue with AS. If the PSA grows more, have a MRI targeted biopsy to search for significant PCa. As long as your PCa continues to be of very low-risk (GL6, 2 or less positive cores, and PSA density less than 0.15) I wouldn't undergo any treatment.