*Myotonic dystrophy is autosomal dominant, caused by CTG repeats with genetic anticipation. Classic form presents in adulthood with muscle weakness and myotonia (impaired muscular relaxation). Infantile presentation includes respiratory failure, hypotonia, inverted V upper lip, cataracts, poor feeding, and clubbed foot. Diagnosis is via genetic testing. | *Myotonic dystrophy is autosomal dominant, caused by CTG repeats with genetic anticipation. Classic form presents in adulthood with muscle weakness and myotonia (impaired muscular relaxation). Infantile presentation includes respiratory failure, hypotonia, inverted V upper lip, cataracts, poor feeding, and clubbed foot. Diagnosis is via genetic testing. |