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.