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Familial mixed congenital myopathy with rigid spine phenotype
H Reichmann1, H H Goebel, C Schneider
1Neurologische Klinik, Bayerische Julius-Maximilians-Universität, Würzburg, Germany.
Abstract:
We describe a father and daughter with a rigid spine syndrome and proximal myopathy. The index patient was a 42-year-old man, who died from respiratory failure after a lifelong, slowly progressive proximal myopathy and a rigid spine phenotype. This was morphologically characterized by cytoplasmic bodies, increased desmin, features of reducing-body myopathy, and sarcoplasmic and intranuclear tubulofilamentous inclusions. These cases are characterized by an early onset and possibly autosomal-dominant inheritance, with associated complex structural hallmarks of both desmin-related and inclusion body myopathies. Together they may be defined as a complex mixed congenital myopathy with a rigid spine phenotype.
Insights
This study details a rare father-daughter case of rigid spine syndrome and proximal myopathy, presenting complex structural hallmarks of desmin-related and inclusion body myopathies.
Area of Science:
- Neurology
- Genetics
- Pathology
Background:
- Rigid spine syndrome (RSS) and proximal myopathy are debilitating neuromuscular conditions.
- Congenital myopathies represent a heterogeneous group of genetic muscle disorders with early onset.
- Desmin-related myopathies and inclusion body myopathies are distinct subtypes with specific pathological features.
Observation:
- A father and daughter presented with a lifelong, slowly progressive proximal myopathy and a rigid spine phenotype.
- The index patient experienced respiratory failure secondary to the myopathy.
- Morphological examination revealed cytoplasmic bodies, increased desmin, features of reducing-body myopathy, and tubulofilamentous inclusions.
Findings:
- The cases exhibited early onset and suggested possible autosomal-dominant inheritance.
- Complex structural hallmarks of both desmin-related and inclusion body myopathies were observed.
- These findings point towards a complex mixed congenital myopathy with a rigid spine phenotype.
Implications:
- This unique presentation expands the understanding of congenital myopathies.
- The findings suggest a potential overlap or shared pathways between desmin-related and inclusion body myopathies.
- Further research into the genetic and molecular basis of this complex myopathy is warranted.