Symptoms of Ehlers-Danlos Syndrome
Ehlers-Danlos syndrome presents with three cardinal features: joint hypermobility, skin hyperextensibility, and tissue fragility, though the specific symptom profile varies dramatically by subtype. 1, 2
Core Clinical Features by Subtype
Hypermobile Type (hEDS) - Most Common Form
Joint and Musculoskeletal Manifestations:
- Joint hypermobility confirmed by Beighton score ≥5/9 points (passive dorsiflexion of fifth fingers >90°, thumb apposition to forearm, elbow hyperextension >10°, knee hyperextension >10°, palms flat on floor with knees extended) 1
- Recurrent joint dislocations or subluxations 1
- Chronic joint or limb pain that often becomes daily and activity-limiting 1, 3
Skin Manifestations:
- Soft or velvety skin texture with normal or only slightly increased extensibility 1
- Easy bruising without significant trauma 1
- Absence of severe skin fragility (which would suggest other EDS subtypes) 1
Systemic Manifestations:
- Functional bowel disorders including functional gastritis and irritable bowel syndrome (present in 98% of patients in one study) 1, 4
- Neurally mediated hypotension or postural orthostatic tachycardia syndrome (POTS) 1
- Chronic pain syndrome 1
- Osteoporosis 1
Craniofacial Features:
Cardiovascular:
- Mild aortic root dilation occurs in one-quarter to one-third of patients with hypermobile type, though dissection risk is not thought to be significant without substantial dilation 1
Vascular Type (vEDS/Type IV) - Most Severe Form
This subtype carries the highest mortality risk with median survival of only 48-51 years. 5, 6
Characteristic Features:
- Easy bruising from minimal trauma 5
- Thin, translucent skin with visible veins 5
- Characteristic facial features 5
- Arterial rupture, dissection, or aneurysm formation (most commonly thoracic and abdominal arteries) - often occurring without preceding aneurysm 5
- Uterine rupture, particularly during pregnancy 5
- Intestinal rupture (often occurs before arterial complications) 5
- Arteriovenous fistulas 6
Critical Clinical Note: Vascular complications may begin during adolescence and recur at unpredictable intervals, with an average of 1.6 events per 5-year period 6. Aortic dissection (both type A and B) occurs in up to 10% of patients 6.
Classic Type
Hallmark Features:
- Skin hyperextensibility (more prominent than in hypermobile type) 2, 7
- Skin fragility with atrophic scarring 7
- Delayed wound healing 7
- Easy bruising 7
- Generalized joint hypermobility 7
Common Pitfalls in Recognition
Do not dismiss patients with predominantly pain and fatigue symptoms - these are legitimate manifestations of hEDS, not psychosomatic complaints. The multisystemic nature (gastrointestinal, autonomic, musculoskeletal) is characteristic and should raise suspicion 4, 3.
Recognize that skin findings differ by subtype: Hypermobile type has soft, velvety skin with minimal hyperextensibility, while classic type has marked hyperextensibility, and vascular type has thin, translucent skin 1, 5, 2.
Vascular type requires immediate recognition due to life-threatening complications - look for the combination of easy bruising, thin skin with visible veins, and characteristic facial features 5, 6.
Associated Comorbidities
Beyond the primary connective tissue manifestations, patients frequently experience:
- Mast cell activation syndrome (MCAS) with symptoms triggered by foods, temperature changes, mechanical stimuli, or emotional distress 4
- Dysautonomia beyond POTS 4
- Functional gastrointestinal disorders affecting nearly all patients with hEDS 4
- Psychological distress related to chronic pain and diagnostic delays 8
The 2017 diagnostic criteria for hEDS have been criticized as overly stringent, potentially excluding patients who would benefit from appropriate diagnosis and management 9. Clinical judgment should prevail when the overall picture is consistent with hEDS even if strict criteria are not fully met.