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).

Duchenne Exon Deletion Tool: DMD or BMD?

Enter the first and last exon from your genetic report to easily understand whether your deletion or duplication is associated with DMD or BMD. Explore approved treatments and potential future treatments for your genetic variant.

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, or tap the 1–79 map. 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. If skipping exon 44, 45, 51, or 53 would restore the frame, a second card explains the matching treatment logic.

Enter one continuous exon range only — multiple separate deletions cannot be analyzed together. Point mutations, nonsense, and intron changes are out of scope. This is educational information, not a diagnosis; confirm results with your clinician or genetic counselor.

Frequent Genotypes