Facial Features of Arthrochalasia-Type Ehlers-Danlos Syndrome
Arthrochalasia-type EDS presents with mild but distinct craniofacial dysmorphism that evolves with age, characterized primarily by hypertelorism, short downslanting palpebral fissures, blue sclerae, micrognathia in infancy progressing to a slender asymmetric face with protruding jaw in adolescence, and a depressed nasal bridge. 1, 2
Age-Specific Facial Characteristics
Infancy and Early Childhood
The facial features in young patients with arthrochalasia EDS include:
- Large fontanelle - often prominent and slow to close 2
- Hypertelorism (widely spaced eyes) - a consistent finding 2
- Short, downslanting palpebral fissures - present in approximately 80% of cases 1
- Blue sclerae - characteristic finding 2
- Depressed/flat nasal bridge - occurs in 80% of arthrochalasia EDS patients, making it a highly specific feature 1
- Short nose with hypoplastic columella 2
- Low-set and rotated ears 2
- Micro-retrognathia (small, receding jaw) 2, 3
- High, narrow palate 2
- Long philtrum 2
- Thin upper lip vermilion 2
- Small mouth 2
Adolescence and Adulthood
The facial appearance undergoes notable changes with maturation:
- Slender, asymmetric face - the infantile fullness gives way to a more elongated appearance 2
- Protruding jaw - develops from adolescence onward, contrasting with the micrognathia of infancy 2
- Less distinct features overall - the dysmorphic characteristics become subtler with age, which can complicate diagnosis in adults 4
Important Clinical Considerations
The evolution of facial features with age is a critical diagnostic pitfall. While infants present with more obvious dysmorphic features, these become progressively less pronounced in older children and adults 4. This can lead to missed or delayed diagnoses when patients first present in adolescence or adulthood.
The depressed nasal bridge stands out as the most specific facial feature, present in 80% of arthrochalasia cases 1, making it particularly valuable for clinical recognition. When combined with the characteristic short downslanting palpebral fissures (also 80% prevalence) and blue sclerae, these features form a recognizable facial gestalt in the appropriate clinical context of severe joint hypermobility and congenital hip dislocation.
Deep-set eyes, while reported in 34% of classical EDS cases, are not a prominent feature of arthrochalasia type 1, helping to distinguish between these subtypes when facial features alone are being considered.
The craniofacial dysmorphism in arthrochalasia EDS is generally described as "mild" or "distinct" rather than coarse 5, 4, 3, which helps differentiate it from other connective tissue disorders with more pronounced facial features. However, the specific constellation of findings—particularly the nasal bridge depression, hypertelorism, and the age-related progression from micrognathia to jaw protrusion—creates a recognizable pattern for experienced clinicians.