Subtype
Arthrochalasia Ehlers-Danlos syndrome (aEDS)
Dominant type caused by variants disrupting the COL1A1/COL1A2 N-propeptide cleavage sites; presents at birth with hip dislocation and marked laxity.
Not medical advice. This page summarizes research and does not recommend any course of care.
| Classification | 2017 International Classification |
|---|---|
| Inheritance | autosomal dominant |
| Genes | COL1A1, COL1A2 |
| Genetic status | confirmed genes |
| Villefranche (1997) | EDS type VIIA and VIIB |
| Prevalence | Ultra-rare; congenital hip dislocation at birth is characteristic |
| Distinguishing features | Severe congenital hypermobility with bilateral hip dislocation, skin hyperextensibility, hypotonia |
| Last checked | 2026-09-16 |
Records that apply to every EDS type
- Medication, dental, and procedural caution knowledge
- The 2017 classification papers cover symptoms beyond joints and skin
- Twelve subtypes require molecular confirmation; hEDS remains clinical
- Criteria-era drift makes old and new EDS literature non-equivalent
- The 2017 classification groups EDS genes by the process they affect
- Beighton score published for epidemiological joint-mobility assessment
- Berlin nosology expands EDS to eleven numbered types
- Villefranche nosology consolidates to six types
- 2017 International Classification defines thirteen subtypes
- Local anesthetic resistance in EDS: patient reports, two surveys, and a 2026 trial
- A 2017 review of pain management in EDS
- Surgical and tissue-handling caution
- Diagnosing EDS and HSD often takes years
- The DICE Global Registry collects patient-reported data on EDS and HSD
- EDS ECHO teaches clinicians and community members about EDS
- The ClinicalTrials.gov EDS portfolio
- Orphanet and GARD keep reference records for rare diseases, including EDS