
John Treffert
Bladder cancer patient advocate and owner of Treffert Innovations LLC in Powell, TN
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Jul 30, 2026
A Patient's Journey on ADCs
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1:09Summer JohnsonHOST
How did you first hear about ADCs? Is there anything you know now that you wish you had known then?

John TreffertGUEST
I was working for a radiation oncology software company based in Sweden when I saw blood in my urine.

John TreffertGUEST
And I was familiar with cancer from my pet work in terms of brain cancer, lung cancer, but bladder was not on my radar at all.

John TreffertGUEST
My GP was worried enough that we had a CT done that found some wall thickening that was suspicious for bladder cancer.

John TreffertGUEST
And he referred me to a urologist he knew where I had my first cystoscopy ever, where we saw a large tumor that was obstructing the right ureter and leading to a little bit of back pain due to hydronephrosis.

John TreffertGUEST
I got introduced, I was diagnosed under managed care, which was the first time I'd ever really needed insurance.