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Novel Rod Domain Duplication in Dystrophin Resulting in X-Linked Dilated Cardiomyopathy
Reid C Chamberlain1, Edward C Smith2, Michael J Campbell3
1Department of Pediatrics, Duke University Medical Hospital, Durham, North Carolina.
Insights
X-linked dilated cardiomyopathy, a heart condition without muscle weakness, was diagnosed in a teen via genetic testing. This rare dystrophinopathy highlights a unique presentation of genetic heart disease.
Area of Science:
- Cardiology
- Genetics
- Neuromuscular Disorders
Background:
- X-linked dilated cardiomyopathy is a rare, heart-focused dystrophinopathy.
- It is genetically linked to Duchenne and Becker muscular dystrophy.
- Characterized by heart failure without skeletal muscle weakness.
Background:
X-linked dilated cardiomyopathy is a rare, cardio-specific form of dystrophinopathy allelic to Duchenne and Becker muscular dystrophy that results in heart failure without skeletal muscle weakness.
Patient Description:
We describe a previously healthy 16-year-old boy who presented with palpitations progressing to heart failure who was ultimately found to have a novel duplication of exons 13-16 in the dystrophin gene resulting in diagnosis of X-linked dilated cardiomyopathy.
Results:
The patient was diagnosed with X-linked dilated cardiomyopathy through clinical diagnosis and genetic testing.
Conclusion:
X-linked dilated cardiomyopathy shares genotypic overlap with Duchenne and Becker muscular dystrophy, with its distinctive feature being a lack of progressive muscular weakness.
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