VAC14 related childhood-onset striatonigral degeneration was first defined in 2016 in two unrelated children with sudden onset neurological disease and regression of developmental milestones. Up to now, 11 cases have been reported. VAC14 is a component of a trimolecular complex that tightly regulates the level of phosphatidylinositol 3,5-bisphosphate (PI (3, 5)P2) and PI (3, 5)P2 is critical for the survival of neural cells. Pathogenic VAC14 variants result in striatonigral degeneration chacterised by prominent vacuolation of neurons in basal ganglia. Here, we present a patient with a homozygous pathogenic VAC14 variant, whose symptoms started at an early age and who had both basal ganglia and brain stem involvement. Our case is one of the youngest patients in literature and involvement of the brain stem is defined for the first time in VAC14 related neurological disease.

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http://dx.doi.org/10.1016/j.ejmg.2020.104117DOI Listing

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