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The 6 Key Subtypes of EDS

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Ehlers-Danlos Syndrome (EDS) has 13 subtypes, but doctors focus on 6 primary ones: hypermobile, classical, vascular, classical-like, spondylodysplastic, and dermatosparaxis. Hypermobile EDS is the most common, while vascular EDS is the most severe due to fragile blood vessels and organs.

Key Takeaways

  • • Hypermobile EDS is the most common subtype and is currently diagnosed through a clinical checklist rather than a genetic test.
  • • Classical EDS is characterized by stretchy skin and paper-thin, atrophic scars, whereas classical-like EDS lacks these distinct scars.
  • • Vascular EDS is the most high-risk subtype due to fragile blood vessels and internal organs, requiring lifelong monitoring and emergency precautions.
  • • Most EDS subtypes are inherited, either through an autosomal dominant or autosomal recessive pattern.
  • • Pregnancy with EDS is often considered high-risk and requires specialized obstetric care to manage connective tissue fragility and joint laxity.

While all forms of Ehlers-Danlos Syndrome (EDS) involve connective tissue, the 13 different subtypes can look very different from one person to the next [1]. Doctors currently focus on 6 primary subtypes that represent the majority of diagnoses and have the most established clinical guidelines [2].

Understanding which “type” you have is critical because it changes how your doctors monitor your health—especially when it comes to your heart, skin, and internal organs [3].

Comparing the 6 Key Subtypes

Subtype Gene(s) Involved Primary Features Inheritance
Hypermobile (hEDS) Unknown Joint hypermobility, chronic pain, soft skin [1][4] Dominant
Classical (cEDS) COL5A1, COL5A2 Stretchy skin, “paper-thin” atrophic scars [5][6] Dominant
Vascular (vEDS) COL3A1 Fragile organs/vessels, thin skin, easy bruising [7][8] Dominant
Classical-like (clEDS) TNXB Stretchy skin, joint laxity, no atrophic scarring [6][9] Recessive
Spondylodysplastic (spEDS) B4GALT7, B3GALT6, SLC39A13 Short stature, bowed limbs, muscle weakness [10][11] Recessive
Dermatosparaxis (dEDS) ADAMTS2 Extreme skin fragility, saggy/redundant skin [12][13] Recessive

1. Hypermobile EDS (hEDS)

This is the most common form of EDS [14]. It is unique because researchers have not yet found the specific genetic “glitch” that causes it [15]. Diagnosis is made purely through a clinical checklist that looks at joint hypermobility (using the Beighton Score), family history, and systemic signs like soft skin or dental crowding [1][16]. For more details, see Diagnosis and the 2017 hEDS Criteria.

2. Classical EDS (cEDS) vs. Classical-like (clEDS)

These two can look nearly identical at first glance, but they have key differences:

  • The Scars: People with cEDS have “atrophic” scars—scars that are thin, wide, and look like crumpled cigarette paper [5]. In clEDS, the skin is very stretchy, but it generally heals normally without those characteristic paper-thin scars [9][17].
  • The Genetics: cEDS is usually passed down from one parent (dominant), while clEDS requires a specific mutation from both parents (recessive) [6][9].

3. Vascular EDS (vEDS): The High-Risk Type

Vascular EDS is the most serious form because it makes the walls of the blood vessels and internal organs (like the colon or uterus) very fragile [7].

  • Vigilance: Spontaneous lung collapses (pneumothorax) or severe bruising in childhood can be early warning signs [18][19].
  • Emergency Protocol: Patients with vEDS must wear a medical alert bracelet and carry an emergency letter detailing their diagnosis. If you experience sudden, severe, or unexplained pain (especially in the chest, abdomen, or head), you must go to the ER immediately and inform triage that you have vEDS and are at high risk for arterial or organ rupture [20][21].
  • Management: Patients with the COL3A1 mutation require lifelong monitoring of their arteries and may be prescribed specific medications, like celiprolol, to protect their blood vessels [7][22].

4. Spondylodysplastic (spEDS) and Dermatosparaxis (dEDS)

These are very rare subtypes that often involve more than just skin and joints:

  • spEDS: Often involves skeletal changes like short stature, bowed limbs, and distinct facial features [10][23].
  • dEDS: Characterized by “extreme” skin fragility [12]. While other EDS types have stretchy skin, dEDS skin can tear very easily, even with minor contact, leading to severe wounding and non-healing scars [24][13].

Inheriting EDS & Pregnancy

EDS is either Autosomal Dominant (you only need one copy of the gene from one parent) or Autosomal Recessive (you need a copy from both parents) [6]. If you have a dominant type like hEDS, cEDS, or vEDS, there is a 50% chance of passing it to your children [25]. Genetic counseling is often recommended to help families understand these risks [26].

Additionally, because of the connective tissue fragility and joint laxity, pregnancy with EDS is often considered high-risk. Women with EDS should seek specialized OBGYN care to carefully monitor and manage their pregnancy and delivery [1].

Frequently Asked Questions

What is the most common type of EDS?
Hypermobile EDS (hEDS) is the most common subtype. Unlike other forms of the condition, it does not have a known genetic marker and is diagnosed using a specific clinical checklist that evaluates joint hypermobility, family history, and skin softness.
What is the difference between classical and classical-like EDS?
While both cause very stretchy skin and joint laxity, classical EDS typically results in paper-thin, atrophic scars after an injury. People with classical-like EDS generally have normal wound healing without these characteristic crinkled scars.
Why is vascular EDS considered a high-risk subtype?
Vascular EDS (vEDS) makes the walls of blood vessels and internal organs extremely fragile. This significantly increases the risk of spontaneous, life-threatening medical emergencies like a lung collapse, arterial rupture, or organ tear.
What precautions should I take if I have vascular EDS?
Because vEDS carries severe risks, it requires prompt medical attention and genetic testing for the COL3A1 gene mutation. If you are diagnosed with vEDS, you must wear a medical alert bracelet and seek immediate emergency care for any sudden or unexplained pain.
How do I know if I have a dominant or recessive form of EDS?
Subtypes like hypermobile, classical, and vascular EDS are typically autosomal dominant, meaning you only need to inherit the gene from one parent. Classical-like, spondylodysplastic, and dermatosparaxis EDS are recessive, requiring a mutated gene from both parents. Genetic testing can help confirm your inheritance pattern.

Questions for Your Doctor

  • • Based on my symptoms, which of these 6 subtypes are you most concerned about, and why?
  • • If you suspect hEDS, how do you rule out the rarer subtypes like clEDS or cEDS since they share many symptoms?
  • • For the subtypes that have known genetic markers, what specific genetic test or panel are you ordering?
  • • If I have the COL3A1 mutation (vEDS), what kind of regular vascular imaging (like MRA or CTA) do I need?
  • • Are there specific specialists (like a cardiologist or dermatologist) you recommend I see based on the subtype I am being tested for?

Questions for You

  • • Do I have 'atrophic' scars—scars that are thin, crinkly, or sunken in—which might point toward Classical EDS?
  • • Have I or anyone in my family ever had a spontaneous organ rupture (like a lung, bowel, or blood vessel) without a clear injury?
  • • Is my skin exceptionally stretchy (more than 1.5–2 cm on the forearm), or does it feel velvety and soft?
  • • Looking at my growth history, was I significantly shorter than my peers, or did I have unusual bone/spine issues as a child?

Want personalized information?

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This page provides educational information about Ehlers-Danlos Syndrome subtypes. It is not a substitute for professional medical advice, so always consult a geneticist or your primary care doctor for an official diagnosis and personalized care plan.

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