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Genetic testing for DMD

Duchenne muscular dystrophy (DMD) is a quite rare genetic condition, so people are not routinely tested to see if they carry it. But when a boy is diagnosed with DMD, his family may seek genetic counselling to find out whether other relatives carry the altered gene. Doctors can work out who is at risk by studying the family tree. A genetic test can usually establish which female relatives are DMD carriers.

DNA analysis of Duchenne muscular dystrophy. Each lane shows a different person's DNA. Some bands are missing in boys with DMD.
DNA analysis of Duchenne muscular dystrophy. Each lane shows a different person's DNA. Some bands are missing in boys with DMD.
Fergus Ryan, National Centre for Medical Genetics, Dublin

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