linkage

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Duchenne and Becker Muscular Dystrophy - Linkage
Gene:		DMD (Dystrophin)
Test:		Linkage analysis by PCR of dinucleotide repeats, 4 intragenic and extragenic markers; recombination frequency ranges from 5 to 10% depending on marker.
CPT Codes:		83891 x 1 83900 x 1 83909 x 1 83912 x 1
Sensitivity:		Depends on the informativeness and pedigree structure of the family.
Cost:		$344 per individual blood sample
Turn Around Time:		Approximately 2 weeks from the time all necessary samples are received
Special Considerations:		Please call the laboratory genetic counselor prior to submitting a family for linkage analysis. On at least one affected individual, we require CPK results, muscle biopsy or dystrophin analysis report and clinical history. CPK results on females seeking information on their carrier status may also be helpful.