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Fingerprint body myopathy: a report of twins
Insights
Ultramicroscopic muscle changes in infantile hypotonia may indicate a specific congenital condition. This rare disorder, seen in identical twins, also shows a risk of central nervous system abnormalities.
Area of Science:
- Neurology
- Pediatrics
- Muscle Biology
Background:
- Infantile hypotonia and weakness are complex pediatric conditions with diverse etiologies.
- Congenital myopathies represent a group of genetic disorders affecting muscle structure and function.
Observation:
- This study reports on two identical twin siblings presenting with infantile hypotonia and weakness.
- These cases are the first full siblings described with this specific condition.
- Ultramicroscopic subsarcolemmal "fingerprint" alterations were observed in muscle biopsies.
Findings:
- The observed muscle pathology may represent a distinct congenital myopathy.
- The condition has been reported in six children to date, including the current cases.
- A significant association with mental retardation was noted in four of the six affected children.
Implications:
- These findings suggest a potential genetic basis for this specific muscle abnormality.
- The co-occurrence of mental retardation highlights a possible link to central nervous system involvement.
- Further research is warranted to elucidate the genetic underpinnings and long-term prognosis of this rare disorder.
Abstract:
Ultramicroscopic changes of subsarcolemmal fingerprints in the muscle of children with infantile hypotonia and weakness may represent a specific congenital entity. Four children have been reported so far. The two children reported in the present paper are the first full siblings to be described and, in addition, are identical twins. Four of these six children also had mental retardation, which suggests that this disorder may carry with it a significant risk of central nervous system abnormality.