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Clinical course of patients with pantothenate kinase-associated neurodegeneration (PKAN) before and after DBS surgery
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Clinical course of patients with pantothenate kinase-associated neurodegeneration (PKAN) before and after DBS surgery
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Clinical course of patients with pantothenate kinase-associated neurodegeneration (PKAN) before and after DBS surgery
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Journal Article
Clinical course of patients with pantothenate kinase-associated neurodegeneration (PKAN) before and after DBS surgery
2019
Overview
IntroductionPantothenate kinase-associated neurodegeneration (PKAN) is a rare autosomal recessive disorder with a progressive clinical course. In addition to symptomatic therapy, DBS has been increasingly recognized as a potential therapeutic strategy, especially in severe cases. Therefore, we wanted to report our experience regarding benefits of DBS in five PKAN cases in 3-year follow-up study.MethodsFive genetically confirmed PKAN patients from Serbia underwent GPi-DBS. To assess clinical outcome, we reviewed medical charts and applied: Schwab and England Activities of Daily Living Scale (S&E), EQ-5D questionnaire for quality of life, Patient Global Impression of Improvement (GPI-I), Functional Independence Measure (FIM), Burke–Fahn–Marsden Dystonia Rating Scale (BFMDRS), Barry Albright Dystonia Scale (BAD). Patients were evaluated in five visits: at the disease onset, 5 years after the onset, before surgery, 6 months and 14–36 months after the surgery. Improvement of 20% was accepted as significant.ResultsOverall, dystonia significantly improved after GPi-DBS at 6 and 14–36 months postoperatively, when assessed by the BFMDRS and BAD. However, two patients failed to improve considerably. Four patients reported improvement on GPI-I, while one remained unchanged. Three patients reported significant improvement, when assessed with S&E and FIM. EQ-5D showed the most prominent improvement in the domains of mobility and pain/discomfort.ConclusionThree out of our five patients experienced beneficial effects of the GPi-DBS, in up to 36 months follow-up. Two patients who had not reached significant improvement had longer disease duration; therefore, it might be reasonable to recommend GPi-DBS as soon as dystonia became disabling.
Publisher
Springer Nature B.V
Subject
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