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Ehlers-Danlos syndrome, clotting disorders and muscular dystrophy
Insights
This study reports a rare case of Ehlers-Danlos syndrome combined with muscular dystrophy and clotting abnormalities. This unique presentation challenges current understanding and classification of this collagen disorder.
Area of Science:
- Genetics
- Internal Medicine
- Neurology
Background:
- Ehlers-Danlos syndrome (EDS) comprises 11 distinct connective tissue disorders.
- The physiopathological complexity of EDS is amplified by its association with other conditions.
- Understanding the interplay between collagen defects and other physiological systems in EDS is crucial.
Observation:
- A 16-year-old male presented with Ehlers-Danlos syndrome, exhibiting novel co-occurrence with muscular dystrophy and clotting abnormalities.
- Affected male family members showed prolonged cephalin-kaolin time, reduced Factor VIII and von Willebrand factor, and abnormal platelet ATP secretion.
- The proband alone displayed significant muscular disease, including quadriceps fatigability, amyotrophy, elevated muscle enzymes, myogenic electromyography, and severe muscular dystrophy on biopsy.
Findings:
- The case presents a unique combination of Ehlers-Danlos syndrome, bleeding diathesis, and muscular dystrophy.
- The observed clotting abnormalities included impaired platelet function and reduced coagulation factors.
- Histopathological and electrophysiological findings confirmed severe muscular dystrophy in the proband.
Implications:
- This case raises questions about the relationship between collagen defects and hemostatic abnormalities in Ehlers-Danlos syndrome.
- The muscular manifestations complicate the classification of this case within the existing 11 EDS types.
- This finding may represent either a coincidental association or an expansion of the known Ehlers-Danlos syndrome spectrum.
Abstract:
Ehlers-Danlos syndrome includes 11 distinct entities. The diversity of this collagen dysplasia and its combination with other abnormalities make it difficult to understand physiopathologically. A case of Ehlers-Danlos syndrome is reported, which is novel owing to its combination with clotting abnormalities and especially with muscular dystrophy. To our knowledge this has not previously been reported. The patient was a young man aged 16 years who presented with Ehlers-Danlos syndrome satisfying Perelman's diagnostic criteria. His father and two brothers had comparable clinical symptoms, but his mother and sister were healthy. The four male subjects had an increased cephalin-kaolin time, reduced levels of factor VIII and Willebrand's factor (but without haemophilia A or Willebrand's disease), and, especially, an abnormal platelet ATP secretion. The proband alone had muscular disease with bilateral quadriceps fatigability and amyotrophy. The muscle enzyme levels were greatly increased, the electromyographic trace was myogenic, and the biopsy showed severe muscular dystrophy. This new observation poses the problem of the relation between clotting abnormalities and collagen abnormalities in the Ehlers-Danlos syndrome. It is difficult to classify this case within any of the 11 known types because of its muscular manifestations. It may perhaps be a fortuitous combination or an extension of the nosological framework of this syndrome.