The DMDWarrior Exon Checker helps families interpret DMD genetic test results by analyzing exon deletion or duplication patterns. Enter the first and last affected exon numbers to determine whether the mutation is more likely associated with Duchenne Muscular Dystrophy (DMD) or Becker Muscular Dystrophy (BMD). This free educational tool is designed to help families better understand their genetic reports.Use the DMDWarrior Exon Checker to interpret your DMD genetic test results and learn whether your child's genetic variant is more consistent with Duchenne Muscular Dystrophy (DMD) or Becker Muscular Dystrophy (BMD).

DMD or BMD? Exon Check Tool

Enter the first and last exon numbers from the deletion (del) or duplication (dup) listed in your DMD genetic report into the exon checker below to find out whether the result is more consistent with Duchenne Muscular Dystrophy (DMD) or Becker Muscular Dystrophy (BMD).

How to Check Your Exons

Use the exon numbers from your genetic report for a whole-exon deletion or duplication in the dystrophin (DMD) gene. This tool covers exons 1–79 on transcript NM_004006.2.

Select Deletion or Duplication to match your report. Enter the first and last exon in the range. For a single exon, use the same number in both fields (for example 12 and 12).

Click Check Exons Now. The result shows in-frame or out-of-frame under the reading frame rule and whether that pattern is more often associated with Becker (BMD) or Duchenne (DMD) muscular dystrophy.

Enter one continuous exon range only — multiple separate deletions cannot be analyzed together. Use the example links under the button to try sample ranges. This is educational information, not a diagnosis; confirm results with your clinician or genetic counselor.