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Questions--5a es

Questions --- Shevrin & Stadler
Is there a difference between Lupron and Zoladex?
Walter Stadler, MD
All of these drugs cause castration, and whether one gives a medication to cut down the
testosterone or one removes the testicles, it has the same effect. In fact, I would argue that
if we want to save a billion dollars in this country on Medicare, everyone with advanced
cancer should have surgical castration because it’s a one-time procedure. We would save
millions of dollars with LHRH agonists that cost a ton of money.
Daniel Shevrin, MD
Intermittent therapy would also be an alternative in terms of cost.
You said that radiation reduces pain. Is it also curative?
Daniel Shevrin, MD
It reduces pain when you irradiate a bone lesion, but that is not curative. Once the tumor
has spread to bones, it is by definition not a curable situation. It is a situation that we
hope to manage for many years and really treat as a chronic disease, but it is not curative.
The only place that radiation is curative is for treatment of the primary tumor.
For a patient who has been on standard hormone therapy in which the PSA has been
controlled but now begins to rise, would the next best thing to move to be Abiraterone?
Walter Stadler, MD, FACP
The logic for that would be in some ways correct. There is a large phase III trial looking
at that question specifically, and that trial has completed accrual. We are awaiting the
results. The short answer is it has the potential, but we are waiting on the data. In essence
we are asking a sequencing question because most of these patients are likely going to get
both docetaxel and something like Abiraterone. The question really is the sequence, and I
don’t know the answer to that. I suspect that the trial that has just been completed is
going to positive. I suspect we are going to be spending a lot of time debating the
appropriate order of these drugs. I just will point out, however, that docetaxel is not as
bad as some people might think.
Regarding the white blood cells that are necessary for Provenge therapy, what about the
order of Provenge? Should you use that before giving the patient chemotherapy, or does
that compromise the white cells?
Walter Stadler, MD, FACP
In the phase III trial, about two-thirds of the patients had no prior chemotherapy. About
one-third had prior chemotherapy. There was no differential benefit in patients who did
or did not receive prior chemotherapy so it doesn’t seem to make a difference. That being
said, our practice has been to typically use this agent prior to chemotherapy because our
practice has generally been to use chemotherapy in patients who have had at least some
symptoms and to use the Provenge on patients who have metastatic disease but no
Daniel Shevrin, MD
I don’t think there is any data that it’s going to interfere with later treatment at all in
terms of white blood cells. It’s a treatment that is extremely well tolerated, and therefore
it’s a very nice option for men who are progressing in whom we really don’t want to
proceed with chemotherapy. I agree that one thing I sometimes worry a little bit about is
that chemotherapy with an extremely effective agent, Taxotere, is kicked further down
the road with these agents. My fear is that when a man really needs Taxotere that window
is closing.
If a patient fails Lupron, what are the various sequential steps for treatment?
Walter Stadler, MD, FACP
First of all, we always consider the availability of clinical trials and whether the patient
should get treatment or should be observed for a while before going to the next treatment.
With those caveats, we tend to add an anti-androgen, withdrawn an anti-androgen, think
about Sipuleucel-T, think about Docetaxel, tend to jump toward Abiraterone and then
think about something like Cabazitaxel.
Daniel Shevrin, MD
As I listed, we have a number of choices, and some of it really does depend on the
particular patient’s disease characteristics. You can tell pretty early on how hormonally
sensitive the cancer is. If you try Casodex and the PSA drops and you get a good
response for six to nine months, then you may use Flutamide or Nilutamide. I use
ketoconazole in relatively low doses, sometimes even without cortisol. Then you can use
something like Provenge. So, sometimes a man who demonstrate sensitivity to hormones
can be treated even with advanced disease for quite a long time.
Now, if the Casodex worked very briefly or not at all, then we realize that we have a
different situation and you’re not going to use Flutamide or Nilutamide and you’ll move a
little bit more quickly to other agents, maybe Provenge. The trick with Provenge is that
because you lose PSA as a marker, it puts the onus on the oncologist to monitor a man in
other ways. Even scans become problematic because many can progress on scans and it’s
still working.


SISTEMA MEXICANO DE INVESTIGACIÓN EN PSICOLOGÍA Cuarta Reunión Nacional de Investigación en Psicología 21 y 22 de junio de 2012 Consumo de café, actividad y comportamiento alimentario en ratas Virginia Gabriela Aguilera Cervantes, Antonio López-Espinoza, Alma Gabriela Martínez Moreno, Asucena Cárdenas-Villalvazo, Elia Herminia Valdez Miramontes y Claudia R. Magaña Gon

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