Historia natural de la distonía mioclónica asociada a variantes de SGCE en niños y adolescentes.

Children and adolescents with SGCE-myoclonus dystonia showed a progression of motor symptoms during a mean follow-up of 4 years. Patients developed a significant increase in the severity of axial and limb myoclonus, as well as dystonia during writing. Consequently, patients reported a marked decline in their speech, writing, and walking abilities. Up to 74% of patients had a psychiatric diagnosis, most commonly anxiety, obsessive-compulsive disorders, and attention-deficit/hyperactivity disorder.

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