Myopathic EDS (mEDS) is an ultra-rare EDS subtype, caused by variants in the COL12A1 gene, that combines muscle weakness with joint hypermobility and progressive contractures.
Diagnosis often comes late, since its features don’t fit the more familiar hypermobile EDS pattern most people expect.
When I was first diagnosed with Ehlers-Danlos syndrome in 2020, I assumed I had the type most people have heard of: hypermobile EDS.
It wasn’t until a couple of years later in 2022, after genetic testing, that I learned I have myopathic Ehlers-Danlos syndrome (mEDS), an ultra-rare subtype caused by a variant in the COL12A1 gene.
Receiving a genetic diagnosis was validating. For the first time, there was an explanation for symptoms that never seemed to fit neatly into the “hypermobility” box. But it also came with an unexpected realization: very few people had the same diagnosis.
When there are only a small number of documented cases worldwide, finding someone who shares your experience becomes difficult. There aren’t large online communities discussing life with mEDS, and many healthcare providers aren’t familiar with the rarer forms of Ehlers-Danlos syndrome.
Instead of feeling like I’d found my community, I felt more alone.
Key Takeaways
- Myopathic EDS (mEDS) is caused by variants in the COL12A1 gene and is estimated to affect roughly 1 in 1,000,000 people, compared to hypermobile EDS at approximately 1 in 500.
- mEDS combines features not typically seen together: early-onset muscle weakness, joint hypermobility, progressive joint contractures, soft doughy skin, and atrophic scarring.
- Because mEDS is under-recognized, accurate diagnosis often requires ongoing self-advocacy with healthcare providers.
- Community and support don’t require sharing the exact same diagnosis. Shared experience within The Zebra Club has been central to Ashley’s sense of belonging.
What Makes Myopathic EDS Different?
Myopathic Ehlers-Danlos syndrome is a rare subtype of Ehlers-Danlos syndrome and is caused by variants in the COL12A1 gene, which provides instructions for making type XII collagen. Unlike many inherited disorders, mEDS can follow either an autosomal dominant or autosomal recessive inheritance pattern, depending on the specific genetic variant.
The recessive form generally causes more severe symptoms beginning at birth, while the dominant form often presents during childhood or young adulthood with milder symptoms.
One of the defining features of mEDS is that it combines characteristics people don’t usually expect to see together. Individuals often experience congenital or early-onset muscle weakness, delayed motor development, joint hypermobility, and progressive joint contractures (the tightening of muscles and surrounding tissues that limits range of motion).
Soft, doughy skin and atrophic scarring are also common. Some individuals develop pectus excavatum (the inversion of the sternum), and emerging research has identified a possible association between mEDS and Chiari I malformation
Living Between Similarities and Differences
Like many people with hypermobile EDS, I experience chronic pain, fatigue, autonomic dysfunction, gastrointestinal issues, and the daily challenges that come with a connective tissue disorder. In many ways, our experiences overlap.
But muscle weakness has always been one of the defining features of my life. As a child, activities that seemed effortless for other kids required tremendous effort. I simply couldn’t make my legs run the way everyone else’s could.
Looking back now, those experiences make much more sense knowing that muscle weakness is considered one of the hallmark features of my subtype.
As I’ve gotten older, another difference has become more apparent. While hypermobility has always been part of my story, I’m gradually becoming less flexible. Instead, I’m developing joint contractures, particularly in my knees and back. I no longer meet all of the Beighton score criteria, which can be confusing for healthcare providers who aren’t familiar with myopathic EDS.
Living with mEDS often leaves me asking questions that don’t have clear answers: Is this a general EDS symptom? Is this a myopathic EDS symptom? Or is it simply my body?
Navigating a Rare Disease
One of the most surprising aspects of living with myopathic EDS isn’t simply that it’s rare—it’s that rarity can easily be overlooked.
Hypermobile EDS is by far the most common subtype of Ehlers-Danlos syndrome, estimated to affect approximately 1 in 500 people, while myopathic EDS is estimated to affect roughly 1 in 1,000,000. Because of that, many healthcare providers understandably have much more experience with hypermobile EDS than with the rarer genetic subtypes.
Even after receiving molecular confirmation of my diagnosis, I’ve had providers change my medical record back to “hypermobile EDS.” I’ve learned to carefully review visit notes, request corrections, and advocate for my diagnosis to be documented accurately.
Living with a rare disease often means becoming an educator as much as a patient.
It also means accepting that many questions don’t yet have answers. There are no large studies to guide treatment, few specialists have firsthand experience with mEDS, and research is still evolving.
While that uncertainty can be frustrating, it has also connected me with the broader rare disease community—people who understand what it feels like to live in the spaces where medicine is still learning.
Finding Community in The Zebra Club
In the same year I was diagnosed with mEDS, I found The Zebra Club. The Zebra Club has helped me realize that many of the challenges I face- learning to pace instead of pushing through, understanding the importance of nervous system regulation, grieving changing abilities, and adapting movement to meet my body’s needs…are experiences shared across many forms of EDS.
My diagnosis may be rare, but the challenges of adapting to an unpredictable body are ones I share with countless people across the EDS community.
Practically, it’s changed the way I care for my body. Because joint contractures are part of my subtype, maintaining safe mobility is especially important. The education I’ve received through The Zebra Club has helped me approach stretching more intentionally, strengthen safely, and view movement as something that nourishes my body rather than something I have to force.
Just as importantly, it has given me a sense of belonging. Opening The Zebra Club platform often feels like coming home. It’s a place filled with people who understand the unpredictability of living with a connective tissue disorder, who celebrate each other’s victories, and who genuinely care when someone is struggling.
Looking Forward
Because myopathic Ehlers-Danlos syndrome is so rare, I hope future research continues to expand our understanding of the condition. Every new publication, every newly identified patient, and every piece of emerging data helps paint a clearer picture for those of us living with mEDS.
But while science continues to catch up, I’ve realized something important. When I first learned how rare my diagnosis was, I assumed that meant I would always feel isolated. Instead, I’ve discovered that community isn’t built on sharing the same genetic variant. It’s built on shared experiences, mutual understanding, and people who remind you that you’re not navigating this journey alone.
