# Deep Brain Stimulation in Leigh-Like Syndrome Due to DNM1 Pathogenic Variant

## TL;DR

Deep brain stimulation can improve movement disorders in patients with a rare mitochondrial disease caused by DNM1 gene mutations.

## Contribution

This paper reports long-term improvement in hyperkinetic movements after GPi-DBS in DNM1-related mitochondrial disorders.

## Key findings

- GPi-DBS is effective for treating hyperkinesias in mitochondrial disorders.
- Pathogenic DNM1-related disorders may show lasting improvement after GPi-DBS.
- Leigh syndrome spectrum can present with atypical symptoms and benefit from brain stimulation.

## Abstract

Leigh syndrome (LS) and Leigh-like syndromes (LLS), now collectively referred to as Leigh Syndrome Spectrum (LSS), encompass a wide range of clinical manifestations, including epilepsy, neurodevelopmental delay, and movement disorders such as ataxia, chorea, and dystonia. Although rare, LSS can present atypical symptoms in certain cases. The primary etiological cause of LSS is genetic, resulting from mitochondrial alterations.

Hyperkinesias in LSS or other mitochondrial disorders can be disabling, leading to a significant reduction in the patient’s quality of life.

Globus pallidum deep brain stimulation (GPi-DBS) surgery is an effective treatment for hyperkinesias, such as chorea, and dystonia, caused by mitochondrial defects.

Pathogenic DNM1-related mitochondrial disorders with Leigh syndrome phenotype may show long-term improvement of hyperkinetic movements after GPi-DBS.