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Main Article Content
Phenotype-Genotype analysis of dystrophinopathy caused by duplication mutation in Dystrophin gene in an African patient
Abstract
Objective: To present the genotype-phenotype analysis of dystrophinopathy with an exon 8 through 9 duplication mutation in a patient of African/Ghanaian descent and his asymptomatic mother.
Methods: Investigations including a biopsy of the vastus lateralis muscle and genetic testing of the patient and his mother.
Results: Genetic testing demonstrated a duplication of exons 8 through 9 of the dystrophin gene in both the patient and his mother. The muscle biopsy of the patient showed partial expression of the dystrophin protein. In the absence of a family history of dystrophinopathy, we hypothesize that this is a sporadic mutation occurring in the grand maternal lineage.
Conclusion: This case extends the world wide epidemiology of this disease to include the African/Ghanaian population and confirms the vulnerability of the dystrophin gene to recurrent spontaneous mutations at the exon 8 and 9 site.
