• Welcome to Phoenix Rising!

    Created in 2008, Phoenix Rising is the largest and oldest forum dedicated to furthering the understanding of, and finding treatments for, complex chronic illnesses such as chronic fatigue syndrome (ME/CFS), fibromyalgia, long COVID, postural orthostatic tachycardia syndrome (POTS), mast cell activation syndrome (MCAS), and allied diseases.

    To become a member, simply click the Register button at the top right.

Question re: ANA results

Gingergrrl

Senior Member
Messages
16,171
Just want to point out that, while it's widely reported in the medical literature that lung cancer as a paraneoplastic syndrome will invariably be small cell lung cancer, this is an incorrect assumption by even Specialists and there is a small percentage of people who also get large cell carcinoma as a paraneoplastic syndrome.

Thanks, KS, and I have read this also and even cases where the cancer is not lung cancer at all and is tonsil or thyroid or all kinds of random things. The consensus seems to be that this antibody links to LEMS or SCLC but I am in a FB group of people from all over the world who have this antibody and most do not have LEMS and none (to my knowledge) have had cancer. Am trying to decide if having high resolution cat scan of my lungs every six months for the next 3-5 years (depending which doctor you ask) is worth the radiation. It seems like once a year should be adequate? I can't quite determine what the true risk is.
 

kangaSue

Senior Member
Messages
1,857
Location
Brisbane, Australia
Thanks, KS, and I have read this also and even cases where the cancer is not lung cancer at all and is tonsil or thyroid or all kinds of random things. The consensus seems to be that this antibody links to LEMS or SCLC but I am in a FB group of people from all over the world who have this antibody and most do not have LEMS and none (to my knowledge) have had cancer. Am trying to decide if having high resolution cat scan of my lungs every six months for the next 3-5 years (depending which doctor you ask) is worth the radiation. It seems like once a year should be adequate? I can't quite determine what the true risk is.
A PET scan (positron emission tomography) is a better option than a CT from a radiation perspective. The risk is smaller with a PET scan because the radioactive substance only stays in your body for a short time.
 

Jonathan Edwards

"Gibberish"
Messages
5,256
But I wish there were a scientist or researcher who knew how to tie this all together b/c I have too many different symptoms/abnormalities on tests for them all to be a coincidence and I can't believe that what I have is rare to really just be a few cases per million people. Maybe all the people with positive ANA's who are negative for the well-known diseases like RA and Lupus, actually have these more rare auto-antibodies but are just not being tested.

There are researchers like Dr Vincent and myself who have been scratching our heads but so far there does not seem to be any clear indication of how to tie things together. I scratched my head for twenty five years over RA and then saw how it made sense - and there were much better clues there, so it is not an easy issue. I suspect your own situation really is that rare. The other people with ANAs don't seem to have your antibodies, but they may each have a different sort of antibody. Remember that the body is capable of producing about 1,000,000,000,000 different types of antibody.

This still confuses me and different doctors have expressed different opinions re: the antibodies and paraneoplastic syndromes. For my antibody (N-type VGCC Ab) the correlated cancer is small cell lung cancer. My doctors have said that this is a very fast growing aggressive cancer that would kill you if not discovered early (and probably kill you any way) and would never be a slow growing cancer that takes five years to discover. So it would seem that I have the autoantibody in the absence of cancer *or* that the antibody is here first and the cancer will come later (or there will never be cancer and I just have the antibody.) But in the case of SCLC, it doesn't make sense to me how it could come first and slowly grow for five years before discovery?

Small cell lung cancers are often fast growing once they are of a visible size. But it is generally understood that most cancers grow slowly to begin with - often for several years. Most cancers involve about ten stepwise mistakes in the DNA. The first few mistakes may not change growth much. Only with the last few mistakes does the cell's growth control break down totally.

What is certainly the case is that the paraneoplastic syndrome may appear at a time when the cancer is invisible and the cancer may go on being invisible for a considerable time. I don't think anybody who knows the scientific side thinks that the antibody comes first and then the cancer. But what is certainly true is that many people with antibodies of this sort never have a cancer.

I agree the antibody does not cause the cancer but was told that different autoantibodies correlate with different types of cancers. Some doctors have expressed to me that knocking down the antibody now (through IVIG, RTX, plasmapheresis if it were available, etc) reduces my chance of getting cancer in the future while others have disagreed and even expressed that the antibody serves some kind of protective factor to fight the cancer from growing beyond a few cells. The level of contradiction/confusion amongst smart doctors seems strange to me but I guess the paraneoplastic syndromes are not well understood or studied?

I don't think there is any reason to think that reducing the antibody level would affect the chance of developing cancer. That sounds to me like simple ignorance to be honest. Moreover, nobody has any evidence since rituximab has not been around long and to prove a reduction in risk would require a huge statistical study over many years. Somebody is talking off the top of their head. I rather suspect that some of the doctors are smart and some not so smart!!

I am certain there must be some connection with auto-antibodies and ME/CFS, at least in one sub-group, or else meds like RTX would not help those individuals?

But do remember that so far we are not sure that rituximab has any effect in ME/CFS. We just have a study that suggests it might do. Dr Fluge and Dr Mella would not want people to think it was proven fact yet that anyone gets benefit. Some patients have done well but that does not mean it was due to the rituximab.
 

Gingergrrl

Senior Member
Messages
16,171
There are researchers like Dr Vincent and myself who have been scratching our heads but so far there does not seem to be any clear indication of how to tie things together. I scratched my head for twenty five years over RA and then saw how it made sense - and there were much better clues there, so it is not an easy issue. I suspect your own situation really is that rare. The other people with ANAs don't seem to have your antibodies, but they may each have a different sort of antibody. Remember that the body is capable of producing about 1,000,000,000,000 different types of antibody.

I bolded part of your quote to make it easier to see. I am not sure how to take it that my situation really is that rare. I don't mean it that I take it as a judgement or anything negative on your part, vs. that I just find it shocking that my situation could really be that different than everyone else here who is trying to get well. There must be others out there with positive ANA titers and my antibody (N-type VGCC Ab.) There are now 38 people in a FB group that I belong to who have this antibody so I know there are some (but our symptoms and diagnoses are so different.) I had no idea that the human body could produce 1,000,000,000 different types of antibodies!

It seems like everything I read though states that regardless of the antibody, the treatments (at this point in science) are IVIG, immuno-modulators or immuno-suppressants such as RTX, and/or plasmapheresis. I know you cannot give medical advice but do you agree that these are the core treatments (even if experimental) at this time for someone with a rare antibody?

Small cell lung cancers are often fast growing once they are of a visible size. But it is generally understood that most cancers grow slowly to begin with - often for several years. Most cancers involve about ten stepwise mistakes in the DNA. The first few mistakes may not change growth much. Only with the last few mistakes does the cell's growth control break down totally.

So even with SCLC, it could go undetected for five years before reaching a visible size? If this is the case, it seems like a lot of radiation for someone to get cat scans and Pet scans every six months to one year for something that may show up five years later or may never occur at all. I've learned that several in my FB group did have cancers but these individuals also had LEMS which I am negative for on EMG. It is so confusing!

What is certainly the case is that the paraneoplastic syndrome may appear at a time when the cancer is invisible and the cancer may go on being invisible for a considerable time. I don't think anybody who knows the scientific side thinks that the antibody comes first and then the cancer. But what is certainly true is that many people with antibodies of this sort never have a cancer.

I bolded part of what you said again b/c I am hoping that I am in the group of people who have the antibodies but never develop the cancer. I am fascinated/confused by a doctor who told me that trying to reduce the antibody now could reduce the future risk of cancer b/c this is so different than what you are saying (i.e. that the cancer always precedes the antibody.)

I don't think there is any reason to think that reducing the antibody level would affect the chance of developing cancer. That sounds to me like simple ignorance to be honest. Moreover, nobody has any evidence since rituximab has not been around long and to prove a reduction in risk would require a huge statistical study over many years. Somebody is talking off the top of their head. I rather suspect that some of the doctors are smart and some not so smart!!

To clarify the doctor I am speaking of (who I will never mention their name for confidentiality) was not speaking about RTX in any context and it is me who is speaking of RTX. However that doctor did say that reducing the antibody through other treatments "immuno-suppressants, IVIG, or PP" could reduce the future cancer risk. It's very perplexing but truthfully, my goal is to improve my symptoms and quality of life in the present regardless of what antibody level may occur on a blood test or what cancer risk I may have for the future.

But do remember that so far we are not sure that rituximab has any effect in ME/CFS. We just have a study that suggests it might do. Dr Fluge and Dr Mella would not want people to think it was proven fact yet that anyone gets benefit. Some patients have done well but that does not mean it was due to the rituximab.

I completely understand that we have no idea what effect RTX may have on ME/CFS and only hints that it might help a certain subgroup. I believe that I am in the subgroup (regardless of what my illness is ultimately called) that might be helped by RTX and if given the opportunity to try it after several months of IVIG, I will absolutely take the opportunity. I feel it is worth the risk for me, knowing that it could do nothing or even make me sicker or worst case scenario, kill me. Learning I had this antibody was a game-changer for me and am still trying to understand it (both from people world-wide who also have it and from doctors.)
 
Last edited:

Gingergrrl

Senior Member
Messages
16,171
I don't know the detailed evidence - I think it is rare and of course one has to assume that sometimes things occur in the same person without a causal link. I think it gets hard to be precise.

Thank you and I tend to agree. My main doc does not think I need a high resolution cat scan every six months b/c of this antibody b/c it is a lot of radiation when you look at my total picture. But I will have another one at some point in the future to compare (probably at the one year mark vs. six months).
 

kangaSue

Senior Member
Messages
1,857
Location
Brisbane, Australia
@Gingergrrl You were asking a while back what effect VGCC Ab's has on calcium flow. I come across this brief explanation today, don't know if it's of any help or makes things any clearer though;
http://www.clinlabnavigator.com/paraneoplastic-autoantibodies.html
[Antibodies directed against VGCC interfere with the normal calcium flux required for the release of acetylcholine. Synaptic transmission fails when antibodies cause a critical loss of calcium channels.]