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Laboratory Test Directory

Myotonic Dystrophy (DM1) Comprehensive Analysis


Name Method Department Units
Myotonic Dystrophy Polymerase chain reaction (PCR)
Capillary electrophoresis
Send Out Genetics

Specimen Requirements

Whole blood

Container Type Container Size Specimen Volume

Purple tube (EDTA)

6 mL 5 mL

Yellow tube (ACD)

8 mL 5 mL

Refrigerated - 1 week(s)
Room temperature - 4 day(s)

Specimen Preparation

  • Mix EDTA tube by gentle inversion immediately after collection
  • Transport to laboratory as soon as possible
  • Do not freeze
  • Do not centrifuge

Reasons for Rejection

  • Clotted specimen
  • Frozen specimen
  • Delayed or improper handling
  • Centrifuged specimen
  • Wrong collection tube


This test analyzes the number of CTG trinucleotide repeats in the DMPK gene. 

CPT Code

  • 81401
  • 81404