Deep Brain Stimulation in childhood-onset dystonia due to brain pathology. A long-term study.

BACKGROUND: Pallidal Deep Brain Stimulation (DBS) is an established treatment option for isolated, inherited or idiopathic dystonia, however data on its safety and efficacy in other forms of dystonia are more limited. OBJECTIVES: Retrospective analysis of motor and non-motor outcomes in pediatric onset refractory dystonia due to static or progressive brain disorders in a cohort of patients with a DBS treatment duration ≥12 months. METHODS: Multidisciplinary assessments including standardised scales/tests of motor function, pain, quality of life, cognition and language were carried out before implantation and longitudinally afterwards. RESULTS: 9 patients were included, 7 had cerebral palsy. Mean age at implantation was 209 months ± 156, mean treatment duration 84 ± 37 months. DBS was well tolerated and positively affected both motor and non-motor functions. In particular, statistically significant improvements were documented in Burke-Fahn-Marsden Scale scores (- 19.9% p 0.01031) at 12 months and in long-term quality of life (+28.6%, p 0.0292). CONCLUSIONS: DBS may be a useful treatment option in generalized dystonia associated with brain pathology. Even when the motor benefits are limited, improvements in quality of life and non-motor functions, or the possible prevention of serious dystonia-related complications, may have a significant impact on overall clinical status.

The dystonic child treated with deep brain stimulation: ICF reading of a high-tech approach.

PURPOSE: The available tools used to describe childhood dystonia tend to offer a monodimensional view of the person functioning, which may overlook significant changes induced by treatment. We applied the International Classification of Functioning, Disability and Health (ICF) perspective to the description of the clinical picture of a dystonic child treated with deep brain stimulation (DBS) to get a more global representation of the treatment effect. METHOD: An 8-year-old child with secondary dystonia was selected within the institutional program for advanced treatment of pediatric dystonia as a candidate for bilateral implantation of electrodes into globus pallidus and chronic stimulation. The International Classification of Functioning, Disability and Health -children and youth (ICF-CY) based project and program format was used by the rehabilitation team to define the clinical picture, rehabilitation objectives, and to verify the outcome. RESULTS: The rehabilitation project and program included 39 ICF categories: 14 body functions, two body structures, 18 activities and participation, and five environment. On such basis we defined the individualized specific rehabilitation objectives and we checked for clinical changes after DBS. CONCLUSION: The ICF-CY format provides a complete and balanced profile of functioning in secondary dystonia treated with DBS and it could offer a novel perspective for outcome evaluation.