Is hormone therapy necessary with radiation?

Posted by Jeff Marchi @jeffmarc, Jun 6 4:42pm

A few different people have asked about this in the last few days so here is some information about it.

Advantage of radiation and hormone therapy given at the same time greatly reduced
Overall survival—the chance of being alive years later—was nearly the same whether or not men received hormones with their radiation. After 10 years of follow‑up, 83.6% of men treated with radiation alone were alive, compared with 84.3% of men who also had hormone therapy, a difference of only 0.7%. Statistically, that small gap did not reach the usual bar for significance, meaning it may simply be due to chance.
However, the story changed when researchers looked at PSA level before radiation. Men whose PSA was 0.5 ng/mL or lower when they started radiation did not live longer if they added hormone therapy—whether they took it for a few months or for two full years. Men whose PSA was higher than 0.5 ng/mL, on the other hand, did see some survival benefit from adding hormones, suggesting that hormone therapy makes the most sense for this higher‑risk group.
The study also examined how long hormone therapy should last. Short‑term therapy (about 4–6 months) performed just as well as long‑term therapy (about 24 months) for most men in terms of overall survival. Longer treatment appeared to reduce the chance of the cancer spreading, but it did not clearly translate into men living longer overall in the general study population. Based on these data. Kishan summarized: for men who truly need it, a short course of hormone therapy is usually enough.

https://prostateblogmonthly.substack.com/p/do-all-men-need-hormone-therapy-after

Interested in more discussions like this? Go to the Prostate Cancer Support Group.

Profile picture for Jeff Marchi @jeffmarc

@jim18
Some people do have severe reactions to ADT. Some people can take it without so much in the way of detrimental side effects to their daily lives, I am one of those . Long term it causes detrimental problems for everybody.

You seem to be discussing treatments that weren’t part of this initial message. Doing PSMA PET scans wasn’t discussed.

Pet scans are done initially in cases where people seem to have advanced cancer, but don’t have biopsies yet. I some of those cases they find quite advanced Cancer with many metastasis. At that point, they do triplet therapy and don’t even bother treating the prostate or doing a biopsy, So they have no idea what the Gleason score is.

Whether or not a PET scan is done ahead of time is based on what is found in the MRI and biopsy. Sometimes those results call for a PET scan, no matter what the Gleason score is.

While Kwon did say 1/3 of patients had reoccurrence only in the prostate bed, That doesn’t preclude the fact that many people will have it in the prostate bed and other places. But the PET scan doesn’t show anything in most of those cases. Is it wise to not do salvage radiation? Studies have shown if people have very advanced cases not doing salvage radiation by .25 causes shorter PFS. You can then wait around for other metastasis to show up, I personally would want and did have salvage radiation when my PSA hit .2.

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@jeffmarc

Why is a PSA of 0.2 critical when normal PSA before any treatment is typically around 1.0. It would seem to me that if a PSA of about 1.0 is normal for someone that a 0.2 PSA would not be a concern. I had a PSA near 0.0 for 15 years before it began to rise because of cancer.

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Profile picture for pesquallie @pesquallie

@jeffmarc

Why is a PSA of 0.2 critical when normal PSA before any treatment is typically around 1.0. It would seem to me that if a PSA of about 1.0 is normal for someone that a 0.2 PSA would not be a concern. I had a PSA near 0.0 for 15 years before it began to rise because of cancer.

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@pesquallie

@jeffmarc

My initial comment had a typo, and I meant to say that my long tern PSA before cancer was about 1.0 for about 15 years.

Why is a PSA of 0.2 critical when normal PSA before any treatment is typically around 1.0. It would seem to me that if a PSA of about 1.0 is normal for someone that a 0.2 PSA would not be a concern. I had a PSA near 1.0 for 15 years before it began to rise because of cancer.
It would seem to me that if a PSA of about 1.0 is normal for someone that a 0.2 PSA would not be a concern.

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Profile picture for pesquallie @pesquallie

@pesquallie

@jeffmarc

My initial comment had a typo, and I meant to say that my long tern PSA before cancer was about 1.0 for about 15 years.

Why is a PSA of 0.2 critical when normal PSA before any treatment is typically around 1.0. It would seem to me that if a PSA of about 1.0 is normal for someone that a 0.2 PSA would not be a concern. I had a PSA near 1.0 for 15 years before it began to rise because of cancer.
It would seem to me that if a PSA of about 1.0 is normal for someone that a 0.2 PSA would not be a concern.

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@pesquallie The 1.0 PSA is when you have a prostate. The 0.2 PSA is when you do not have a prostate (after surgery) so your PSA should be close to zero.

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Profile picture for soli @soli

Very good information. Thank you @jeffmarc

One question I still have is about the magnitude of the survival benefit for patients who receive treatment when their PSA is greater than 0.5. Is the benefit truly significant, or is it relatively small—for example, an improvement from 82% to 85% survival?

A second question that this study does not appear to address is whether patients with high-risk disease (either biologically and/or pathologically) derive a significant benefit from ADT, as Dr. Kishan and others have suggested in the past.

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@soli
There is definitely a survival benefit for those that have high risk disease. Getting treated for high risk people is really important to be done before they rise above .25 according to a study that I was reporting on in another set of messages. In those cases, hormone therapy really is important. For those that don’t have high risk, those getting the radiation at above .5 PSA do benefit from adding hormones therapy. It says so pretty clearly in the message above.

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Profile picture for Jeff Marchi @jeffmarc

@jim18
Some people do have severe reactions to ADT. Some people can take it without so much in the way of detrimental side effects to their daily lives, I am one of those . Long term it causes detrimental problems for everybody.

You seem to be discussing treatments that weren’t part of this initial message. Doing PSMA PET scans wasn’t discussed.

Pet scans are done initially in cases where people seem to have advanced cancer, but don’t have biopsies yet. I some of those cases they find quite advanced Cancer with many metastasis. At that point, they do triplet therapy and don’t even bother treating the prostate or doing a biopsy, So they have no idea what the Gleason score is.

Whether or not a PET scan is done ahead of time is based on what is found in the MRI and biopsy. Sometimes those results call for a PET scan, no matter what the Gleason score is.

While Kwon did say 1/3 of patients had reoccurrence only in the prostate bed, That doesn’t preclude the fact that many people will have it in the prostate bed and other places. But the PET scan doesn’t show anything in most of those cases. Is it wise to not do salvage radiation? Studies have shown if people have very advanced cases not doing salvage radiation by .25 causes shorter PFS. You can then wait around for other metastasis to show up, I personally would want and did have salvage radiation when my PSA hit .2.

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@jeffmarc We are saying the same thing. The study was about patients that had RP which would not have occurred if it was already metastatic. What I said is if the standard of care is just radiation to the prostate bed and local area with no ADT than a PSMA PET can always be done later if there is still rising PSA. Without the ADT there is no impairment of the PSMA PET scan in finding any distance metastases. I am in favor of hitting it early and hard with radiation. Just agree with the study that if PSA is still low the ADT should not be used until it is shown to be required.

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Profile picture for wheel1 @wheel1

Jeff,
I know most studies always discuss PFS, Progession Free Survival which is different then OS, Overall survival. When I do see these mentioned together there is often little statistical differences between PFS and OS at five or ten years, yet going for the certain treatments always recommended for Standard of Care seems to rely on those PFS results over OS results. Often times the difference’s in treatment approaches can mean significant side effects for what appears to be little overall gain in benefit of survival by some of these studies just show differences in months. I feel it is so important for the second opinions and not to feel restricted by the National Cancer guidelines which make it so easy for Oncologist’s to say this is your recommended treatment and not really compare alternatives since Standard of Care does not offer other options with maybe less side effects even if the Standard of Care is arguably not that much better. Is it reasonable in a situation which certainly they are all different for individuals and their degree of their PC to say look PFS and OS are really not much different in this situation although the SOC based on the PFS studies will likely result in certain side effects, yet since OS is not much different in going another route with less side effects ho that approach.
Do you see much discussed regarding PFS and OS.

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@wheel1
It is true that you don’t see PFS or OS Compared in some of the studies. I think if you have a very short PFS, it’s going to impact your OS. You’re going to have to go in for more treatment you will have metastasis that have to be treated. That definitely affects OS Because of the drugs And treatments involved affect the body. Those kinds of treatments can have deleterious effects of the heart. They can also damage other organs like the liver and kidneys.

It’s a real dance. The 87-year-old doctor that was in the meeting I was talking about on Saturday felt he was over treated for prostate cancer and as a result, it has damaged his heart. Being on ADT and Zytiga at 82 was not optimal treatment. He has multiple heart issues that are not really treatable.

Just some things to think about.

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Profile picture for pesquallie @pesquallie

@jeffmarc

Why is a PSA of 0.2 critical when normal PSA before any treatment is typically around 1.0. It would seem to me that if a PSA of about 1.0 is normal for someone that a 0.2 PSA would not be a concern. I had a PSA near 0.0 for 15 years before it began to rise because of cancer.

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@pesquallie
After a prostatectomy, the PSA should stay undetectable. As I have mentioned ASCO published information about this. Treatment for those people that have a .2 PSA should have it treated with salvage radiation. Those with very advanced cases should Make sure their PSA doesn’t get above .25 or I can have long-term effects.

If somebody has radiation, then they wait until the PSA hits two points above the minimum it hit after radiation hit its bottom. That’s a different situation where you can start treating at 1, Or at least start testing at 1.

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Forgetting about these treatments, combining prescription drugs that you take into the equation even gets more complicated. I now have Oncologist, gastroenterologist, cardiologist, urologist, hematologist, maybe one I am forgetting. I couldn’t get one medication that was the best for something because my blood thinner, this one medication impacts with that one, the interactions get more complicated trying to figure out each time you need an antibiotic for something. I think you can judge your age by the number of prescription bottles that you have.

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Profile picture for wheel1 @wheel1

Jeff,
I know most studies always discuss PFS, Progession Free Survival which is different then OS, Overall survival. When I do see these mentioned together there is often little statistical differences between PFS and OS at five or ten years, yet going for the certain treatments always recommended for Standard of Care seems to rely on those PFS results over OS results. Often times the difference’s in treatment approaches can mean significant side effects for what appears to be little overall gain in benefit of survival by some of these studies just show differences in months. I feel it is so important for the second opinions and not to feel restricted by the National Cancer guidelines which make it so easy for Oncologist’s to say this is your recommended treatment and not really compare alternatives since Standard of Care does not offer other options with maybe less side effects even if the Standard of Care is arguably not that much better. Is it reasonable in a situation which certainly they are all different for individuals and their degree of their PC to say look PFS and OS are really not much different in this situation although the SOC based on the PFS studies will likely result in certain side effects, yet since OS is not much different in going another route with less side effects ho that approach.
Do you see much discussed regarding PFS and OS.

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@wheel1 Anecdotal evidence is non-scientific, but I'm at nearly 5 years progression-free survival after a 2021 diagnosis of stage 4b prostate cancer metastasised to my spine.

10–15 years ago, that diagnosis would have meant progression in 18–24 months and death in 3–5 years, so doublet therapy (ADT+ARSI) and MDT/PDRT for the win! They literally gave me a second chance at the life that I thought was about to run out when I was diagnosed at age 56.

Understood that optimal treatment for low-risk, early-stage PCa is a different discussion, but I personally don't mind ADT side effects too much as long as I'm still alive to experience them. 😉

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Profile picture for northoftheborder @northoftheborder

@wheel1 Anecdotal evidence is non-scientific, but I'm at nearly 5 years progression-free survival after a 2021 diagnosis of stage 4b prostate cancer metastasised to my spine.

10–15 years ago, that diagnosis would have meant progression in 18–24 months and death in 3–5 years, so doublet therapy (ADT+ARSI) and MDT/PDRT for the win! They literally gave me a second chance at the life that I thought was about to run out when I was diagnosed at age 56.

Understood that optimal treatment for low-risk, early-stage PCa is a different discussion, but I personally don't mind ADT side effects too much as long as I'm still alive to experience them. 😉

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