With perineural invasion and bladder cancer, I think the cancer is systemic and you would benefit from triplet therapy -- ADT, an ARPI, and chemo Taxotere.
I believe that perineural invasion is a path out of the prostate for the cancer, which it may have already taken on diagnosis.
You showed perineural invasion on diagnosis in Mar 2023, which means cancer cells had spread into the tissue surrounding nerves. Similar to you, I showed perineural invasion on diagnosis in 2021, had treatment (radiation vs your RP), and then no ADT.
By 2023 I had biochemical recurrence and mets to nodes, and only then started doublet therapy (ADT + ARPI). I believe that early systemic treatment would have delayed or prevented my mets.
Similar here. After IMRT PSA never dropped lower than 1.0 before starting back up. Been fighting it for 19 years. Push it back for a while but it always seems to find a work around and pops back. Have had low grade bladder cancer with two resections. The bladder cancer also seems to always find a work around. Just finished Pluvicto with good results but I am sure it will just be temporary. Also on Nubeqa and Lupron. PSA undetectable for the moment but been there before after other protocols.
As you have again asked for "Any ideas or comments". I too had salvage RT after my RP; my cancer had spread beyond both treatment fields. I did not want ADT either so found my way to imaging in Europe that successfully identified multiple pelvic lymph node mets at 0.13. That imaging is not available here in the US.
In a few weeks I have FDG with MDA Houston - main focus is metastatic melanoma but also a comparative glance for any possible lingering prostate cancer. My PSMAs have been clear for prostate cancer so have awareness question as to whether my PCa is PSMA avid.
I also have liquid blood biopsy testing. Hope this helps. All the best!
Ferrotran nanoparticle MRI. splmed.com. Had mine 7 years ago - seems to be ongoing trial drama. This began as Combidex in US in 1990's - conspiracy thinkers could find a story here. In my anecdotal case, five cancerous pelvic lymph nodes found at 0.13 - when many would say nut'in to worry about; maybe even 'undetectable' because <0.2. All the best to all of us!
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