In depth
Relapsing polychondritis and environment
This is a page about a question that has no answer yet, and it's written that way on purpose. Relapsing polychondritis is rare, the research on it is small, and no published study has measured an exposure in the people who live with it. What follows is an account of what was searched for, what came back, and why what's missing from the literature is shaped the way it is.
What the research says, and what it does not.
There isn't enough research to draw any conclusion about the environment and relapsing polychondritis. No study we could find has measured an exposure in people who have this disease and compared it against people who don't, which is the only design that would settle the question. This page won't fill that in with a guess, and it won't dress a review article up as though it were evidence.
What we looked for.
We searched the medical literature for relapsing polychondritis paired with smoking, with tobacco, with workplace exposure, with air pollution, and with risk factors in general. Every search was limited to studies in people, and each one left out single case reports, letters, and editorials. That's the same bar every other page on this site applies before a figure reaches a reader.
What turned up.
The searches return a small set of papers, and every one of them is about the disease after diagnosis rather than before it. They cover the airway, the heart, hearing, treatment, and how often the disease comes back, and several are reviews written by experts rather than studies that measured anything. Not one of them compares the exposures of people who have this disease against the exposures of people who don't.
An environment page with nothing on it
This page exists because the question comes up in almost every appointment, and it deserves a straight answer even when the straight answer is disappointing. People who have just been told they have relapsing polychondritis think back over the jobs they've held, the houses they've lived in, and everything they've breathed along the way. That instinct is a good one, because for several other autoimmune diseases the exposure research is strong enough to act on.
For this one it isn't, and the reason is that no published study has measured an exposure in people who have relapsing polychondritis and compared them against people who don't. So there's no figure to give you here, and no sentence on this page begins with the words one study found. What you get instead is an account of what was searched for and what came back.
Publishing a blank is uncomfortable, and the temptation is always to fill it with something that sounds authoritative. A confident cause built on nothing is what you'll find in plenty of other places, and it's worse than useless because it sends you chasing something no research supports. A blank that explains why it's blank at least tells you where the edge of the knowledge is.
What we looked for
We searched the published literature for this disease paired with smoking, with tobacco and cigarettes, with workplace and occupational exposure, with air pollution, and with risk factors in general. Every one of those searches was limited to studies in people, which counts for more than it sounds because animal work turns up in exposure searches constantly. Each search also left out single case reports, letters, and editorials.
That's the same bar this site sets before any figure reaches a reader, and it isn't relaxed for a rare disease just because the pickings are thin. The full list of search strings appears in the review notes written for the physician rather than being described in general terms here. Writing them down means anybody can repeat them and check whether the result still holds.
What came back
The papers that come back are real papers about a real disease, and several of them are good ones. They simply answer a different question, because almost all of them describe what happens to somebody after the diagnosis has already been made. Some count how often the airway becomes involved, some look at the heart or the hearing or the blood tests, and some are reviews an expert assembled from other people's work rather than studies that measured anything new.
Not one of those papers asks what the person was exposed to before they got sick, which is the only study design that could answer the question this page is about. That study hasn't been done, and given how the research on rare diseases usually goes it may not be done for a long time. So the page stays as it is until something changes.
Why rare diseases end up like this
Working out whether an exposure raises risk takes one particular kind of study, and the design isn't complicated. You need a large group of people who have the disease, a matched group of people who don't, and a reliable record of what each group was exposed to. Then you compare the two and see whether the exposure turns up more often on one side than the other.
For a common disease that's achievable, and rheumatoid arthritis is the obvious example because national registries hold tens of thousands of patients. The smoking evidence in that disease is strong for that one reason alone, because the numbers were there to build the comparison on and the comparison held up when other groups repeated it. Relapsing polychondritis has nothing remotely like that, and most of the published series in this disease count their patients in dozens.
A series of that size can describe the disease well, and the descriptive work on relapsing polychondritis is genuinely useful to the people treating it. What it can't do is separate a real risk from chance, because with dozens of patients an exposure that looks common in the group may simply be common in the population the group came from. That's a limit of arithmetic rather than a limit of effort.
What to do with a blank
Don't read this as reassurance, because the question hasn't been looked at here, and that's a different thing from somebody looking and finding nothing. Only the second of those is evidence, and this page is the first kind. Anything you were exposed to falls outside what the research can speak to either way.
Do keep telling your team about real exposures, and say so plainly if you work around dust, fumes, or smoke. This disease can involve the airway in some people, and those exposures affect the airway whatever started the illness. That conversation rests on your lungs rather than on any theory about what caused the diagnosis, which is why it's worth having regardless of what this page says.
Be careful with anybody who offers you a confident cause, because the published research holds no cause and a certain answer has to be coming from somewhere else. Some of those answers are sold to you and some are offered kindly by people who mean well. Neither one is built on a study, and you're entitled to ask which paper an answer came from before you rearrange your life around it.
Common misconceptions.
Myth. There's no research linking this to my environment, so my environment is fine.
Reality. Those are two different statements and only the first one is true, which is a distinction worth holding onto. The looking hasn't been done, and an absence of looking is a different thing from a careful look that found nothing. A blank on this page is a blank in the research, so you shouldn't read it as a clean bill of health for anything you were exposed to.
Myth. The site just hasn't collected the papers yet.
Reality. We went and checked before writing this, and the search strings are written out in the review notes so anybody can repeat them. The papers that come back describe how the disease behaves once somebody has it, and not one of them measures an exposure beforehand. If that changes, this page changes with it, because the searches are recorded rather than remembered.
Myth. A rare disease gets studied like any other disease.
Reality. It can't be, and that's most of the reason this page has nothing on it. Asking whether smoking raises your risk requires a large group of patients alongside a matched group without the disease, and common illnesses have national registries holding tens of thousands of people. This one has case series counted in dozens, which is enough to describe the illness and nowhere near enough to measure a risk.
Myth. Nothing here is proven, so there's no point raising it with my doctor.
Reality. It's still worth raising, because your rheumatologist is treating you and not a study. A workplace exposure can affect your lungs and your airway whether or not it had anything to do with causing the disease. Relapsing polychondritis already threatens the airway in some people, so telling your team what you breathe at work is useful information for them to have.
Cautions specific to this condition.
- Don't read a blank page as a safe one. No research has been done here, which is different from research finding nothing.
- Be careful with anybody selling you a cause. There's no published evidence identifying an environmental trigger for this disease, so a confident answer isn't coming from the literature.
- Tell your team about workplace dust, fumes, or smoke anyway. This disease can involve the airway, and those exposures affect the airway regardless of what started it.
- Smoking is worth raising with your team for reasons that have nothing to do with this page. The airway complications of this disease and the effects of smoking are in the same place.
- Ask your rheumatologist before changing anything on the strength of what you read online about triggers for rare diseases.
Discuss any change with the rheumatologist who manages your care. Nothing here replaces that conversation.
Questions patients ask.
Did something in my environment cause my relapsing polychondritis?
There's no answer to give, and the reason is simply that it has never been studied. There's no published study that measured what people with this disease were exposed to and compared that against people without it. That's an honest blank rather than a finding, and we'd rather hand you the blank than offer a cause no research supports. The blank is less satisfying, but it's the only thing here that's true.
Does smoking make relapsing polychondritis worse?
No study has measured it in this disease, so the evidence you'd want doesn't exist yet. What's known is that smoking damages the airway and that this disease can damage the airway too, which is why your team may well raise it with you. Take that as ordinary lung advice, not as evidence about relapsing polychondritis itself. The distinction changes little about what you do, and quite a lot about what you should expect the research to support.
Why is there so little research on this?
It's a rare disease, and rare diseases are hard to study for reasons that have nothing to do with anybody's interest in them. Asking whether an exposure raises risk means comparing a large group of patients against a matched group of people without the disease, and most countries don't have enough patients to build that comparison at all. So the research that does exist describes small groups of people who already have the diagnosis, which is worth having and answers a different question.
Is there an environmental test I should ask for?
There's no test that would answer this question, and no guideline recommends one. A test for an exposure tells you what's in your body now rather than what your body met years before the disease appeared. So a real workplace exposure that worries you is a conversation about your lungs and your job. It's a good conversation to have with your team, and it is perfectly worthwhile on its own without needing any link to this diagnosis.
Should I move house or change jobs?
Not on the strength of this page, which holds no evidence in either direction. A change that size deserves a real reason behind it, and the research here doesn't give you one. If your work exposes you to dust, fumes, or smoke, and if your airway is already involved, that's a genuine thing to raise with your team. It rests on your airway rather than on any research about what causes this disease.
Will this page change?
Yes, and the searches behind this page are written out in full so that anybody can repeat them next year. Say a study turns up that measures an exposure in people with this disease, compares them against people without it, and reports what it found. Then this stops being a page about a blank. It becomes an ordinary sourced page like the rest of the site, and that would be a good day.
Across the site