[Report of four women with Duchenne or Becker muscular dystrophy].

Introduction: Duchenne and Becker muscular dystrophy are X-linked and affect mainly males. The authors report four female cases.

Exegesis: Four patients presented muscular deficiency predominant to lower limbs and chronic disease. Female distrophinopathy is understandable by three mechanisms: Turner's syndrome, translocation X-chromosome with an autosome and skewed X-chromosome inactivation.

Conclusion: Diagnosis of female Duchenne and Becker muscular dystrophy is really difficult if there is not male case in family.