Staging terminology
Although using the phrase ‘Stage IV’ to describe the onset of metastatic disease makes things easier to explain, it’s not fully correct or accurate unless it is your initial diagnosis. Here’s the scoop straight from the American Cancer Society since I could not locate a clear definition on this site!
“An important point some people have trouble understanding is that the stage of a cancer is determined only when (or soon after) the cancer is diagnosed. This stage does not change over time, even if the cancer shrinks, grows, spreads, or comes back after treatment. The cancer is still referred to by the stage it was given when it was first found and diagnosed, although information about the current extent of the cancer is added (and of course, the treatment is adjusted as needed).
For example, let's say a woman is first diagnosed with stage II breast cancer. The cancer goes away with treatment, but then it comes back and has spread to the bones. The cancer is still called a stage II breast cancer, now with recurrent disease in the bones.
If the breast cancer did not go away with the original treatment and spread to the bones it would be called a stage II breast cancer with bone metastasis. In either case, the original stage does not change and it's not called a stage IV breast cancer. Stage IV breast cancer refers to a cancer that has already spread to a distant part of the body when it's first diagnosed.
This is important to understand because survival statistics and information on treatment by stage for specific cancer types refer to the stage when the cancer was first diagnosed. The survival statistics related to stage II breast cancer that has recurred in the bones may not be the same as the survival statistics for stage IV breast cancer.
At some point you may hear the term "restaging." Restaging is a term sometimes used to describe doing tests to find the extent of the cancer after treatment. This is rarely done, but it may be used to measure the cancer's response to treatment or to assess cancer that has come back (recurred) and will need more treatment. Often the same tests that were done when the cancer was first diagnosed (such as physical exams, imaging tests, biopsies, and maybe surgery) will be done again. After these tests a new stage may be assigned. It's written with a lower-case "r" before the new stage to note that it's different from the stage at diagnosis. The originally diagnosed stage always stays the same. While testing to see the extent of cancer is common during and after treatment, actually assigning a new stage is rarely done, except in clinical trials.
Comments
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We have had many discussions on this before as well this explanation from ACS. I understand what this piece is pointing out, but in reality most of us just say stage IV even if we were lower stage at initial dx. After 8 years , I have never said I am stage IIB with a bone metastases. BTW, the time between my initial dx and discovery of the bone met was about 6 weeks. Considering that it was grade 1, I was never really IIB , was I? Anyway, regardless of what you call it, it stinks
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It doesn't matter at all what it's called for the purposes of statistics. What people are living with -- and dying from -- is MBC.
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I also wonder if “staging” affects access to social security benefits... eg in Australia if you are stage IV you are automatically eligible whereas other stages are not.
Jackie
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Kanga, here in the US one qualifies for Social Security disability by being diagnosed with metastatic breast cancer.
The application is put on a fast track under a Compassionate Allowance and can be given an OK quickly but then there is a five month waiting period prior to getting benefits. Mine was approved in ten days earlier this year. The medical documentation I provided simply consisted of the hospital and visit summaries available on my clinic's patient portal. I receive the amount I would be collecting at full retirement age.
I did a search on this topic before starting a new one however didn't see any recent discussion. I think it is quite important to be precise in our understanding, especially when it does relate to how we are counted statistically. The NCI website uses language similar to the ACS: A cancer is always referred to by the stage it was given at diagnosis, even if it gets worse or spreads. New information about how a cancer has changed over time gets added on to the original stage. So, the stage doesn't change, even though the cancer might.
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Actually it does matter what it's called for purposes of statistics - many people don't realize that SEER data for metastatic/Stage IV breast cancer only includes people who were diagnosed Stage IV de novo. That's why everything you see about the number of people living with mets and the approximately 42,000 dying every year from metastatic breast cancer are only estimates. They started with the number of deaths from breast cancer, assumed that everyone who died from breast cancer had metastatic disease, and then backed into estimated numbers and percentages based on the number of women who were diagnosed at any stage, the number they assume will later metastasize, and survival statistics. I read the white paper that described the methodology used by the researchers who came up with those numbers when I was trying to determine the number of people living with MBC in my county using the SEER database. I was surprised to learn that there is no official record when someone progresses to Stage IV. If you are added to the database as Stage II, you will always be counted Stage II.
Only a small percentage of us are Stage IV de novo. If you are diagnosed at an earlier stage and later progress to Stage IV, you aren't counted in the official SEER records, so no one really knows how many of us there are. Many believe this is one of the reasons that MBC doesn't get the attention we feel it needs.
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SEER definition please
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Surveillance, Epidemiology, and End Results is the SEER database run by the National Cancer Institute. In the US, only a subset of geographic locations report cases of cancer so much of the info is extrapolated. Other countries track every patient which makes their systems much more reliable in my opinion.
As Lori so eloquently describes above, we are not counted with any degree of accuracy because of this method of data collection. I agree that it becomes more difficult to get attention when no one knows how many we are!
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Thanks, vln.
Like exbrnxgrl says, there's been prior discussion on this topic—I certainly don't mind more discussion. But the strange way of data collecting for this disease has always been a source of frustration because as stated, no definitive number is known as to how many women TOTAL are living with: breast cancer that has moved to other parts of the body and is no longer contained only in the breast. Call it stage iv, call it a lesser stage bc that has metastasized, call it metastatic breast cancer. But shouldn't there be a cumulative number of the entire population of women, and men, who are dealing with breast cancer that has spread to other body parts, regardless of when this has occurred, either found at initial diagnosis or later to be found to have progressed from a lesser stage?
I, too am like exbrnxgrl. It was first thought that I was at stage ii because an MRI showed no lymph node involvement. However, a pet scan revealed bone metastases. This all happened within six weeks of discovering a mass in my breast and prior to beginning any treatment. I consider myself as stage iv de novo. Others may disagree.
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One would certainly think so DivineMrsM. The fact that we don't even have accurate numbers on how often breast cancer metastasizes, let alone how many of us are living and dying with it. because it is not officially tracked is mind blowing. It's all guesswork. Educated guesswork, but it's still just estimates.
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7 years ago, I was told stage3,grade 3. Last MO visit, after surgery and rads, again on the other side, I asked a dumb question. He said, you DO understand you are stage 4 now? Yes I do. I’m on ibrance and letrozole now. Maybe he should read this?
My DH just received his results from a bone scan today. Prostate ca years ago, 35 rads. Bone Mets all over. So is he stage? Does it really matter
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I can’t recall ever seeing survival stats based on this definition (stage 2 with bone Mets). Can you point to some
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Is this why my MO always writes "restaging" when ordering scans? Maybe it has to do with insurance approval for frequent scanning..?
I remember this discussion before as the stats do not accurately reflect survival data of all of us with metastatic disease.
Signed me: DCIS with metastatic disease to liver.
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I must be one of those restaing peeps but they haven't assigned me a new stage as far as I know , only that they are going curative and treating me as If I wasn't stage 4 with the incurable mindset (mastectomy , rads, aggressive treatment). This was changed when they saw everything resolve so quickly and positively. My file might have that “r" but I don't routinely get to see my chart .
I don't know what the future holds , but I'll take it as a cautiously good sign
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For jen, here's something which Spoonie posted on another forum if it helps. I hope the link works because it goes to the pubmed article where you can see how they break out their categories by stage.
"Late recurrences, defined as happening 5 or more years after diagnosis, account for at least half of all recurrences in estrogen receptor (ER)-positive, early-stage breast cancer. Tumor size and nodal status predict for recurrence, even after 5 years. Data from the Early Breast Cancer Trialists' Collaborative Group Meta-Analysis demonstrated that breast cancer recurrences continued steadily from 5 to 20 years in women younger than age 75 at diagnosis of ER-positive breast cancer who were disease-free after 5 years of scheduled endocrine therapy.
The projected risk of distant recurrence 20 years from diagnosis was 13% among the patients with N0T1 disease (i.e., size smaller than 2 cm) and 19% in those with N0T2 cancer. In the modern era, with improved treatments, the rates of distant recurrence are probably lower, although it will take longer follow-up to define this risk precisely."
Here’s another, slightly more recent Canadian report which also partly answers Jen’s question: Breast Cancer Res Treat. 2019 Jan;173(2):465-474. doi: 10.1007/s10549-018-5002-9. Epub 2018 Oct 16.
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It’s counter intuitive because the word “Stage” seems to describe the disease going through different phases or stages of severity.
But in actuality , if the disease does become more severe, they’re still referring to it as less severe.
My sister couldn’t understand why I was not considered a lower stage than IV after two clear scans. But, not moving backwards makes a little more sense to me. Saying ok, once the cancer has moved beyond the breast, it’s in a different category, even if you go into remission (NED) - that seems consistent with the “Stage” terminology.
But “Stage II with bone mets” not so much
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6 years passed from my stage 2 diagnosis in 2011 to my recurrence in 2017. I had a 2.9 cm spot in my mediastinum LN and nothing else.
The report from Professor Johnston at The Royal Marsden called this loco- regional recurrent BC. He did not write stage 4 on his letter to me after O visited him for a second opinion.
My current oncologist however has always stressed incurable, terminal ....
I’m oligometastic ( unless next month’s scan reveals progression) What are distant LN’s as there is some discrepancy here over what is actually a stage 4 dx.
I have learnt to accept Stage 4 whilst being a little confused over definitions. Important not to get too hung up on this though as I will always be in treatment and that is what matters to keep me stable for as long as possible.
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I wonder why they told you up front it's not curable and terminal. Loco-regional recurrence is not the same as metastatic/Stage IV, which is when distant mets develop in other parts of the body. Everything I have read about loco-regional recurrence is that it should always be treated with the intent to cure, and although it may not always be successful, it should at least be attempted. Unless your country uses a different definition than others do? Where are your mets (sorry, says "Other" on your profile)?
Example: "The locoregional recurrence of breast cancer is not a sign of distant metastases, and a substantial proportion of cases are cured by salvage therapy. Patients with locoregional recurrence should not be treated with palliative intent as if they have visceral metastases. The recommended treatment for ipsilateral breast recurrence after breast conservative therapy is a mastectomy. For patients who suffer from isolated chest wall recurrence after mastectomy, a surgical approach is recommended. Neoadjuvant chemotherapy is considered for patients with unresectable disease in order to render the disease resectable. For patients with isolated chest wall recurrence who have received no prior radiotherapy, postoperative radiotherapy involving the chest wall and regional lymph nodes is recommended. Patients with isolated axillary lymph node recurrence should be treated with axillary dissection or resection. Although the effectiveness of systemic therapy for patients with locoregional recurrence is unclear, there is a trend toward treating patients with supraclavicular lymph node recurrence with radiotherapy plus systemic therapy. Pain relief and the eradication of other distressing symptoms resulting from inoperable disease are achieved in two-thirds to three-quarters of patients by radiotherapy with or without systemic therapy. New anti-cancer agents and molecular target therapies should be evaluated with the objective of improving the treatment outcome of patients with locoregional recurrence. A combination of approaches is required for treatment of patients with locoregional recurrence, and a multidisciplinary tumor board should be organized at each institute." https://www.ncbi.nlm.nih.gov/pubmed/20449777
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And sorry if I worded that in a way that sounds insensitive Liz. I tend to be one of those overly curious people who wants to understand reasons for everything and sometimes it can come across as cold.
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Hi Lori
I appreciate this and no you were not insensitive in any way. The report from the UK professor did use the phrase loco- regional recurrent bc. The tumour was in the superior mediastinum area, not in any organ. It was a small recurrence. Between the 2 specialists there seems to be some difference in the terminology used.
Before I started THP I was considered for the CORE trial which I believe was attempting stereotactic radiotherapy for oligometastic patients like me. Unfortunately my tumour was pressing against the left internal jugular vein and so despite going to several MDT meetings I was denied this route.
Since then I have had an excellent response and my oncologist is hopeful of a long term response, yet he still makes it clear that I cannot be cured.
I know this sounds ridiculous but I have never really challenged the staging side. I am on the right treatment and of course hope that maybe O am in that intermediate category before distant spread occurred.
L x
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When my solitary brain met was discovered, 10 months to the day after my Stage 1A diagnosis, my paperwork from that point forward identifies me as having "metastatic breast cancer." After the brain met was discovered, my MO discussed with me that this changes my stage to stage IV and will change how I am treated. He discussed the differences and was clear that stage IV is not curable. He also stated at this time I was considered oligometastic, as I only had the single met and went on to explain how they are seeing promising responses to treatment for the oligo folks. This was all 4.5 years ago and I have remained NEAD in both my brain and body since the surgery to remove the brain tumor in 2015.
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