| Summary: | Abstract The precise genetic diagnosis of dystrophinopathies can be challenging, largely due to rare deep intronic variants and more complex structural variants (SVs). We report on the genetic characterization of a dystrophinopathy patient. He remained without a genetic diagnosis after routine genetic testing, dystrophin protein and mRNA analysis, and short‐ and long‐read whole DMD gene sequencing. We finally identified a novel complex SV in DMD via long‐read whole‐genome sequencing. The variant consists of a large‐scale (~1Mb) inversion/deletion‐insertion rearrangement mediated by LINE‐1s. Our study shows that long‐read whole‐genome sequencing can serve as a clinical diagnostic tool for genetically unsolved dystrophinopathies.
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