We are 30 years into the PSA era. I was diagnosed half-way in - 15 years ago - & no-one seemed happy with the PSA/biopsy model back then.
Laurence Klotz started writing about active surveillance [AS] at about that time, & has over 100 papers on the subject. He may have invented the term, although Chris Parker at the Royal Marsden also had a paper with the same title at that time. Klotz has a paper out this month: "Active surveillance in intermediate risk prostate cancer" & he still seems to be at the Division of Urology, Sunnybrook Health Sciences Centre, Toronto. But I suspect he is the same "Dr. Laurence Klotz, MD, FRCSC, CM, miR Scientific’s Chief Medical Officer", currently in Barcelona, where he presented:
"a non-invasive screening liquid biopsy urine test that identifies clinically significant prostate cancer and detects the presence of higher-grade cancer in men on active surveillance".
Some will be cynical of the profit motive, perhaps, but I think he brings a lot of credibility to the product.
Over 25% of men on AS in the U.S. will progress & should not be on AS IMO.
biospace.com/article/releas...
-Patrick