Neoadjuvant Chemo - No Survival Benefit
This article shows shrinking tumors does not mean extending survival. In triple negatives neoadjuvant chemo caused less overall survival.
Neoadjuvant/presurgical treatments
Breast Cancer Research 2008, 10(Suppl 4):S24doi:10.1186/bcr2184
The electronic version of this article is the complete one and can be found online at: http://breast-cancer-research.com/content/10/S4/S24
Introduction
In this article the term 'neoadjuvant' is used to describe pre-operative treatment for 3 months or more for large (usually ≥ 3 cm) operable cancers before surgery. Clinical response and pathological response are important end-points. The term 'presurgical' refers to treatment of short duration (around 2 weeks) before surgery, sometimes referred to as a 'window of opportunity' study. This approach can be used for any size of cancer provided it can be core biopsied, and the endpoints are molecular markers.
Traditional goals of neoadjuvant therapy include the following:
- to improve survival;
- to downstage so that inoperable cancers become operable or so that conservative surgery can replace mastectomy;
- to identify short-term clinical or molecular markers of response to predict long-term outcome as a prelude to (or as a substitute for) adjuvant trials;
- to predict outcome and plan further treatment in the individual patient; and
- to identify the molecular mechanisms that underlie response and resistance to treatment.
Short-term presurgical therapies can have similar aims with the proviso being that this treatment will not lead to downstaging and that clinical and pathological response rates are unrealistic end-points.
Current evidence suggests that there is no survival benefit from neoadjuvant chemotherapy [1]. The question has not thus far been addressed in a large neoadjuvant endocrine therapy trial. Neoadjuvant chemotherapy has been shown to downstage and reduce the need for mastectomy in some but by no means all women [1]. The same is true for neoadjuvant endocrine therapy; about 40% of mastectomies can be avoided with preoperative aromatase inhibitor therapy [2].
Short-term surrogate clinical and pathological markers for outcome
Clinical response
Clinical response is widely used as a primary or secondary end-point in current neoadjuvant chemotherapy trials. This, however, is misguided.
Table 1. End-points in current neoadjuvant chemotherapy trials
In our own series of 995 patients treated with neoadjuvant chemotherapy at the Royal Marsden Hospital, London, over the past 15 years, there was no significant correlation between clinical response (including clinical complete remission) and long-term disease-free survival or overall survival. Similar findings were reported for the National Surgical Adjuvant Breast and Bowel Project (NSABP)B-18 trial, in which 1,500 patients were randomly assigned to receive neoadjuvant or adjuvant chemotherapy [3]. In the subsequent NSABPB-27 trial, which involved almost 2,500 patients, neoadjuvant adriamycin/cyclophosphamide (AC) alone, four courses, was compared with the same treatment followed by docetaxel for four courses prior to surgery. The sequential arm achieved a significantly higher complete clinical remission rate than AC alone (64% versus 40%; P < 0.001) but there was no significant difference in survival [4,5].
In our own experience, neoadjuvant chemotherapy involving cisplatin or carboplatin achieved a significantly higher complete clinical remission rate in patients with triple negative breast cancer than in others (88% versus 51%; P < 0.005), but there was no improvement in overall survival, and indeed the triple negative group exhibited a trend toward inferior survival [6].
Comments
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There is limited long-term data on survival and recurrence with neoadjuvant therapy.
Second, the "research" cited is applicable only to triple negative breast cancer.
Third, there is no evidence of decreased survival/recurrence. All studies to date show equivalence in survival with adjuvant and neo-adjuvant, with only increased local recurrence in neo-adjuvant when surgery is omitted.
Fourth, typically the goal of neoadjuvant therapy is debulking a tumor so that less invasive surgical technique can be used (lumpectomy vs mastectomy).
Fifth, no one claimed improved survival.
It is misleading to post a headline that sounds general (No benefit to this or that) without specifying the subgroup to which it applies (Triple negatives).
Ah yes, and let's not forget that the researchers are UK-based, where there is a well-known bias against neoadjuvant therapy. They simply are not as "up" on the current research and standards of care that we enjoy in the US.
One only has to search "neoadjuvant chemotherapy breast cancer" to find about 10x as many articles showing the benefits of this approach, and quite a few offering data contradicting the article cited here.
And finally, what does this have to do with Alternative, Complementary, and Holistic Treatment?
You should post it on the Triple Negative Forum. That's what it's about.
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What is a complete clinical remission, does that mean no cancer was found at all?
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thanks for the interesting info on neoadjuvent chemo. I was told at that there was no difference in outcome either way and I was commited to mastectomy even if my tumor was completely gone. this is the first article I've seen on the subject. thanks again, tina
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I wish more doctors were honest about what chemo can and can't do. Chemo only works if you have active disease. If you have a tumor cut out with clear margins that is NO proof that you have a little cells floating around. Chemo should always come before surgery or there is no proof to be using it. By the way it has only been in the last three to four years doctor started treating more patients with chemo first. Why? Took forty years to figure this out? Giving it first will also tell after surgery if this chemo class of drugs did anything to your tumor by the tumor pathology report.
After going stage IV patients really find the truth out about chemo. Chemo can NOT put cancer into remission after recurrences. If you don't believe it check it out. Only something like 2% make remission again and they are hormone+ patients and the hormone modifiers can possibly hold progression.
So if the chemo can't stop the cancer after remission...what makes us think that chemo will stop your disease if you take chemo after have surgery with clean margins? Why do chemo at this point? Do you have active cells? Even if you do chemo there is no proof that chemo will put you into "remission". Ask a Stage IV patient. May slow it down but not stop. There has to be a better way to see if you have cancer cells still in your body and when to start chemo after original dx.
This is a lot of maybe's so we should slam the patient not knowing what we are really treating. We all are willing to be treated out of fear not out of medical proof....
Cure for breast cancer in the US is surgery! The best advancement has been lymph mapping.
Flalady
PS: I'm talking about early stage disease here.
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Flalady, I know that you really research data so I'm going to ask you - is this so of all cancers or only breast cancer? Do you know? Thanks for all your work!! Best
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There are a few cancers that they can't take out with surgery. Lucky they do seem to respond better to some chemos. The only ones I know of are some of the lymphoma & leukemia. Liver,lung & brain all must have good surgery or rads procedures. Kidney do not get chemos as we get them. Also slow growing cancer's sometime do well with chemo. Again usually does not cure but keeps the disease stable for many years. They also have found testicle cancer very easy to treat with chemo. They now know this is a cancer looks and acts very different they many of the other cancers.
I'm not saying that people don't beat cancer all the time. I'm just saying rarely do you if your surgery does not come back with clear margins and your disease found early. I do believe some cancer respond very well with the new cyberknife & Gemma knife procedures. Burn that sucker out there. I have read many stories and meet patients who have beat stage iv disease. They NEVER put their care in the hands of one doctor or one drug. They did many different things natural and conventional. I have a cousin who had kidney cancer that only twelve other people in the world has had. She has been in remission for five years. She did very thing she could throw at it. (conv/alt) What work? Big part was five different surgeries to remove her disease. She said after that she does not know.
The problem is we have to find what works for us. As many stage iv patients we learn everything we can about our disease because at some point you will be making the calls on what to do next. My treatment this year was agreed upon by me and my doctor. He now ask me what I want to do next because anything I now do is (including the past year) all is experimental. Anything after your first couple of chemo's is experimentally at this time. This is true for all receptors. If I'm going to take cramp shots with my chemo, I might as well do alternative many of these ideals have more research behind them than just keep doing chemo that have not been tested to have any value for breast cancer.
Flalady
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Thanks much.. I knew you would know - I've been wondering about why the hold off on using the new knives too.. There are a few other people in the family with other cancers so I appreciate your input! Best
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Well where does that leave us that had CPR to chemo? We have surgery and theres nothing there. How do we know surgery worked? I thought this was a good sign. Ugh i'm so confused
Are you talking about stage four BC, or any stage? I am going to look into ALT treatments too just as a preventative!!
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fightinhard, (love your name by the way)
We talking about early disease only right now....
There is no proof that surgery worked for early disease but there is a very "high chance it does" with clear margin and node removal. That why I think this needs to be addressed first in research. Does the patient have active cancer cells after surgery. I feel patients may need chemo after original tx but only if they can see activity. Until we find out a better way of testing for active cells, we should give lower dose chemo on and off for a year or two just in case instead of bounding a patient upfront who may or may not have disease and destroy their body needlessly for over a year or more. Now they have a weaken body and immune system and can't fight off the side effects from rads and chemo. My doctor did feel the way to treat is do chemo, surgery, rads if needed and than stop for four or five months and than do low dose chemo again just in case there are cells trying to move around.
Flalady
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Oops.. about the article...If chemo before surgery does not help TN ladies...why would it help after? If I'm going to do chemo for early stage TN... am sorry I would only do it before or not at all. I really would like to see more info on this. Let me know if any one is more info.
Flalady
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What you are saying makes sense. I was under the impression (probably my own
that it all boils down to chemo. Some it works, some it doesnt, and doing chemo first is a good way to gage that. Seems i may be wrong, which is scary, because i had a great response to chemo, and so did one of my good friends, who is triple neg! (we both had stage 3 pos nodes - nothing after chemo)
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Just found a study where they think they can track TN cells with just a MRI after surgery. This would be great news.
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FloridaLady, you wrote: ".....Chemo only works if you have active disease..."
That's exactly right. Chemo extends life in those cases. But they've been inflicting chemotherapy indiscriminately on estrogen-positive, early stage women, in total disregard of the evidence.
And anomdenet, thank you for this article. I have been reading extensively about the difference between tumor shinkage and overall survival.
That's the problem with the current orientation of research in America (luckily, things are starting to change in Europe, where they are able to "see the light" faster, because research in those countries is much less dependent on money from the pharmaceutical industry).
I have written somewhere else, and I will never stop repeating: tumor shrinkage and overall survival are 2 completely different matters. Alas..... as soon as a substance is shown shrinking a tumor, the pharmaceutical industry jumps on it to market it immediate (often with studies cut short to save time). Never mind that in reality, the patient will only survive on average 3 months more at the cost of whatever quality of life they could have still enjoyed if they did not have to deal with all those horrendous treatments.
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Is adjuvent online completely wrong then on the benefit they show for chemotherapy on both survival and recurrance rates for ER+ BC? They definately show increased survival and decreased recurrance rates for ER+ BC for both hormone therapy, chemo therapy, and the two combined. Are they based on guesswork on incorrect assumptions? I'm frightened to be honest by what you are saying, and how at odds it is with adjuvent online, a source that appears to be relied upon by oncologists. I read studies where they compared different chemo regimens and showed the differences in survival rates between them. If chemo doesn't work, then what am I supposed to make of these studies? Clearly you are right if you say they don't have a control group, where they don't receive chemo at all, but there were difference between the treatment groups, so doesn't that show it works to some degree?
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Timothy -
When studies state there was no difference in survival, they mean a survival advantage was not proven statistically at the time the study was stopped.
I'll give the example for herceptin because I am most familiar with those studies. The first readouts of the herceptin trials showed large decrease in recurrence, but not a statistically significant increase in survival. That was because people live for a while after they recur, so it takes awhile to see the effect in survival statistics. By the second analysis, herceptin did show a statistically demonstrated increase in survival.
Typically, in cancer studies, a decrease in recurrence eventually shows up as a decrease in deaths, it just takes years of follow-up to see.
Also keep in mind that just because a study does not show a statistically proven advantage, that doesn't mean that the treatment didn't work, only that it hasn't been proven (perhaps sample size too small or a lot of variability in the data.) Or it could mean it doesn't work.
Another example: zometa study: demonstrated statistically significant reduced recurrences, and reduced number of cancer deaths, but too soon to prove statistically improved survival. But based on reduced distant recurrence rate, improved survival will likely show up in the next analysis,
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orange1: fantastic explanation.
And here is another, very simplified, explanation of the difference between RELATIVE and ABSOLUTE statistics (clearly explaining why Adjuvant Online [Quoting Timothy] is able to show benefit for chemotherapy on both survival and recurrence rates for ER+ BC?):
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